665510655500 has 48 divisors (see below), whose sum is σ = 1467586795584. Its totient is φ = 263619734400.

The previous prime is 665510655463. The next prime is 665510655529. The reversal of 665510655500 is 5556015566.

665510655500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6409769 + ... + 6512768.

It is an arithmetic number, because the mean of its divisors is an integer number (30574724908).

Almost surely, 2^665510655500 is an apocalyptic number.

It is an amenable number.

665510655500 is an abundant number, since it is smaller than the sum of its proper divisors (802076140084).

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

665510655500 is a wasteful number, since it uses less digits than its factorization.

665510655500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12922659 (or 12922647 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 44.

The spelling of 665510655500 in words is "six hundred sixty-five billion, five hundred ten million, six hundred fifty-five thousand, five hundred".