66057512 has 16 divisors (see below), whose sum is σ = 131143860. Its totient is φ = 31085824.

The previous prime is 66057499. The next prime is 66057533. The reversal of 66057512 is 21575066.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 64224196 + 1833316 = 8014^2 + 1354^2 .

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 3 ways as a sum of consecutive naturals, for example, 242723 + ... + 242994.

Almost surely, 2^66057512 is an apocalyptic number.

It is an amenable number.

66057512 is a deficient number, since it is larger than the sum of its proper divisors (65086348).

66057512 is a wasteful number, since it uses less digits than its factorization.

66057512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485740 (or 485736 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 66057512 is about 8127.5772527857. The cubic root of 66057512 is about 404.2413517183.

The spelling of 66057512 in words is "sixty-six million, fifty-seven thousand, five hundred twelve".