66740255910240 has 192 divisors, whose sum is σ = 229360249907712. Its totient is φ = 16178294681600.

The previous prime is 66740255910203. The next prime is 66740255910311. The reversal of 66740255910240 is 4201955204766.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74281285 + ... + 75174395.

It is an arithmetic number, because the mean of its divisors is an integer number (1194584634936).

Almost surely, 2^{66740255910240} is an apocalyptic number.

66740255910240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66740255910240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114680124953856).

66740255910240 is an abundant number, since it is smaller than the sum of its proper divisors (162619993997472).

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

66740255910240 is a wasteful number, since it uses less digits than its factorization.

66740255910240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907293 (or 907285 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 51.

The spelling of 66740255910240 in words is "sixty-six trillion, seven hundred forty billion, two hundred fifty-five million, nine hundred ten thousand, two hundred forty".