660624056 has 8 divisors (see below), whose sum is σ = 1238670120. Its totient is φ = 330312024.

The previous prime is 660624037. The next prime is 660624067. The reversal of 660624056 is 650426066.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×660624056² = 872848286731782272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41288996 + ... + 41289011.

It is an arithmetic number, because the mean of its divisors is an integer number (154833765).

Almost surely, 2^660624056 is an apocalyptic number.

It is an amenable number.

660624056 is a deficient number, since it is larger than the sum of its proper divisors (578046064).

660624056 is a wasteful number, since it uses less digits than its factorization.

660624056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82578013 (or 82578009 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 660624056 is about 25702.6079610611. The cubic root of 660624056 is about 870.9330967280.

The spelling of 660624056 in words is "six hundred sixty million, six hundred twenty-four thousand, fifty-six".