64705656 has 16 divisors (see below), whose sum is σ = 161764200. Its totient is φ = 21568544.

The previous prime is 64705651. The next prime is 64705657. The reversal of 64705656 is 65650746.

64705656 is nontrivially palindromic in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64705651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1348011 + ... + 1348058.

Almost surely, 2^64705656 is an apocalyptic number.

It is an amenable number.

64705656 is an abundant number, since it is smaller than the sum of its proper divisors (97058544).

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

64705656 is a wasteful number, since it uses less digits than its factorization.

64705656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696078 (or 2696074 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 64705656 is about 8043.9825957047. The cubic root of 64705656 is about 401.4647464145.

The spelling of 64705656 in words is "sixty-four million, seven hundred five thousand, six hundred fifty-six".