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66951 = 3243173
BaseRepresentation
bin10000010110000111
310101211200
4100112013
54120301
61233543
7366123
oct202607
9111750
1066951
1146335
12328b3
1324621
141a583
1514c86
hex10587

66951 has 12 divisors (see below), whose sum is σ = 99528. Its totient is φ = 43344.

The previous prime is 66949. The next prime is 66959. The reversal of 66951 is 15966.

It is not a de Polignac number, because 66951 - 21 = 66949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 301 + ... + 473.

It is an arithmetic number, because the mean of its divisors is an integer number (8294).

266951 is an apocalyptic number.

66951 is a deficient number, since it is larger than the sum of its proper divisors (32577).

66951 is a wasteful number, since it uses less digits than its factorization.

66951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 219 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 66951 is about 258.7489130412. The cubic root of 66951 is about 40.6055773033.

The spelling of 66951 in words is "sixty-six thousand, nine hundred fifty-one".

Divisors: 1 3 9 43 129 173 387 519 1557 7439 22317 66951