64944686 has 16 divisors (see below), whose sum is σ = 101913984. Its totient is φ = 30980664.

The previous prime is 64944667. The next prime is 64944703. The reversal of 64944686 is 68644946.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 64944686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18785 + ... + 21971.

It is an arithmetic number, because the mean of its divisors is an integer number (6369624).

Almost surely, 2^64944686 is an apocalyptic number.

64944686 is a deficient number, since it is larger than the sum of its proper divisors (36969298).

64944686 is a wasteful number, since it uses less digits than its factorization.

64944686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3655.

The product of its digits is 995328, while the sum is 47.

The square root of 64944686 is about 8058.8265895228. The cubic root of 64944686 is about 401.9584909658.

The spelling of 64944686 in words is "sixty-four million, nine hundred forty-four thousand, six hundred eighty-six".