665100056 has 16 divisors (see below), whose sum is σ = 1247353800. Its totient is φ = 332472384.

The previous prime is 665100053. The next prime is 665100067. The reversal of 665100056 is 650001566.

665100056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665100053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44516 + ... + 57548.

Almost surely, 2^665100056 is an apocalyptic number.

It is an amenable number.

665100056 is a deficient number, since it is larger than the sum of its proper divisors (582253744).

665100056 is a wasteful number, since it uses less digits than its factorization.

665100056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19418 (or 19414 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 665100056 is about 25789.5338461167. The cubic root of 665100056 is about 872.8956477980.

The spelling of 665100056 in words is "six hundred sixty-five million, one hundred thousand, fifty-six".