64665516 has 24 divisors (see below), whose sum is σ = 151248384. Its totient is φ = 21503440.

The previous prime is 64665499. The next prime is 64665521. The reversal of 64665516 is 61556646.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1080 + ... + 11423.

It is an arithmetic number, because the mean of its divisors is an integer number (6302016).

Almost surely, 2^64665516 is an apocalyptic number.

It is an amenable number.

64665516 is an abundant number, since it is smaller than the sum of its proper divisors (86582868).

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

64665516 is a wasteful number, since it uses less digits than its factorization.

64665516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12941 (or 12939 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The square root of 64665516 is about 8041.4871758898. The cubic root of 64665516 is about 401.3817133417.

The spelling of 64665516 in words is "sixty-four million, six hundred sixty-five thousand, five hundred sixteen".