64745668 has 24 divisors (see below), whose sum is σ = 122266368. Its totient is φ = 29822496.

The previous prime is 64745647. The next prime is 64745669. The reversal of 64745668 is 86654746.

It is not an unprimeable number, because it can be changed into a prime (64745669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34605 + ... + 36427.

It is an arithmetic number, because the mean of its divisors is an integer number (5094432).

Almost surely, 2^64745668 is an apocalyptic number.

It is an amenable number.

64745668 is a deficient number, since it is larger than the sum of its proper divisors (57520700).

64745668 is a wasteful number, since it uses less digits than its factorization.

64745668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2523 (or 2521 counting only the distinct ones).

The product of its digits is 967680, while the sum is 46.

The square root of 64745668 is about 8046.4692878305. The cubic root of 64745668 is about 401.5474805396.

The spelling of 64745668 in words is "sixty-four million, seven hundred forty-five thousand, six hundred sixty-eight".