6660155606665 has 16 divisors (see below), whose sum is σ = 8760070259136. Its totient is φ = 4820793364800.

The previous prime is 6660155606639. The next prime is 6660155606683. The reversal of 6660155606665 is 5666065510666.

It is not a de Polignac number, because 6660155606665 - 2⁷ = 6660155606537 is a prime.

It is a Duffinian number.

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, 286940382 + ... + 286963591.

It is an arithmetic number, because the mean of its divisors is an integer number (547504391196).

Almost surely, 2^{6660155606665} is an apocalyptic number.

It is an amenable number.

6660155606665 is a deficient number, since it is larger than the sum of its proper divisors (2099914652471).

6660155606665 is a wasteful number, since it uses less digits than its factorization.

6660155606665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573904200.

The product of its (nonzero) digits is 34992000, while the sum is 58.

The spelling of 6660155606665 in words is "six trillion, six hundred sixty billion, one hundred fifty-five million, six hundred six thousand, six hundred sixty-five".