64634660 has 24 divisors (see below), whose sum is σ = 136106880. Its totient is φ = 25782624.

The previous prime is 64634657. The next prime is 64634681. The reversal of 64634660 is 6643646.

It is a self number, because there is not a number n which added to its sum of digits gives 64634660.

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, 3317 + ... + 11843.

It is an arithmetic number, because the mean of its divisors is an integer number (5671120).

Almost surely, 2^64634660 is an apocalyptic number.

It is an amenable number.

64634660 is an abundant number, since it is smaller than the sum of its proper divisors (71472220).

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

64634660 is a wasteful number, since it uses less digits than its factorization.

64634660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8915 (or 8913 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 35.

The square root of 64634660 is about 8039.5683963755. The cubic root of 64634660 is about 401.3178616666.

The spelling of 64634660 in words is "sixty-four million, six hundred thirty-four thousand, six hundred sixty".