65665615506 has 32 divisors (see below), whose sum is σ = 134303443200. Its totient is φ = 21397315920.

The previous prime is 65665615469. The next prime is 65665615511. The reversal of 65665615506 is 60551656656.

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, 454780 + ... + 581511.

It is an arithmetic number, because the mean of its divisors is an integer number (4196982600).

Almost surely, 2^65665615506 is an apocalyptic number.

65665615506 is an abundant number, since it is smaller than the sum of its proper divisors (68637827694).

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

65665615506 is a wasteful number, since it uses less digits than its factorization.

65665615506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036534.

The product of its (nonzero) digits is 4860000, while the sum is 51.

The spelling of 65665615506 in words is "sixty-five billion, six hundred sixty-five million, six hundred fifteen thousand, five hundred six".