6505656516666 has 32 divisors (see below), whose sum is σ = 14457198009600. Its totient is φ = 2168524643040.

The previous prime is 6505656516617. The next prime is 6505656516683. The reversal of 6505656516666 is 6666156565056.

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, 3775750 + ... + 5221838.

It is an arithmetic number, because the mean of its divisors is an integer number (451787437800).

Almost surely, 2^{6505656516666} is an apocalyptic number.

6505656516666 is an abundant number, since it is smaller than the sum of its proper divisors (7951541492934).

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

6505656516666 is a wasteful number, since it uses less digits than its factorization.

6505656516666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529411 (or 1529405 counting only the distinct ones).

The product of its (nonzero) digits is 174960000, while the sum is 63.

The spelling of 6505656516666 in words is "six trillion, five hundred five billion, six hundred fifty-six million, five hundred sixteen thousand, six hundred sixty-six".