Cookie Consent by FreePrivacyPolicy.com
Search a number
-
+
66439353440 = 25511313926437
BaseRepresentation
bin111101111000000110…
…000001010001100000
320100111021100212001002
4331320012001101200
52042031433302230
650304413531132
74541300120615
oct757006012140
9210437325032
1066439353440
11261a4312669
1210a624a3aa8
13635a8659b5
143303b8c50c
151adcc24545
hexf78181460

66439353440 has 96 divisors (see below), whose sum is σ = 159497281440. Its totient is φ = 26150068224.

The previous prime is 66439353439. The next prime is 66439353521. The reversal of 66439353440 is 4435393466.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2499902 + ... + 2526338.

It is an arithmetic number, because the mean of its divisors is an integer number (1661430015).

Almost surely, 266439353440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66439353440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79748640720).

66439353440 is an abundant number, since it is smaller than the sum of its proper divisors (93057928000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66439353440 is a wasteful number, since it uses less digits than its factorization.

66439353440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26704 (or 26696 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 47.

The spelling of 66439353440 in words is "sixty-six billion, four hundred thirty-nine million, three hundred fifty-three thousand, four hundred forty".

Divisors: 1 2 4 5 8 10 16 20 32 40 80 113 139 160 226 278 452 556 565 695 904 1112 1130 1390 1808 2224 2260 2780 3616 4448 4520 5560 9040 11120 15707 18080 22240 26437 31414 52874 62828 78535 105748 125656 132185 157070 211496 251312 264370 314140 422992 502624 528740 628280 845984 1057480 1256560 2114960 2513120 2987381 3674743 4229920 5974762 7349486 11949524 14698972 14936905 18373715 23899048 29397944 29873810 36747430 47798096 58795888 59747620 73494860 95596192 117591776 119495240 146989720 238990480 293979440 415245959 477980960 587958880 830491918 1660983836 2076229795 3321967672 4152459590 6643935344 8304919180 13287870688 16609838360 33219676720 66439353440