6656656005 has 32 divisors (see below), whose sum is σ = 11899480320. Its totient is φ = 3530589120.

The previous prime is 6656655961. The next prime is 6656656079. The reversal of 6656656005 is 5006566566.

It is not a de Polignac number, because 6656656005 - 2¹⁷ = 6656524933 is a prime.

It is a super-2 number, since 2×6656656005² = 88622138337805120050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111777 + ... + 160646.

It is an arithmetic number, because the mean of its divisors is an integer number (371858760).

Almost surely, 2^6656656005 is an apocalyptic number.

It is an amenable number.

6656656005 is a deficient number, since it is larger than the sum of its proper divisors (5242824315).

6656656005 is a wasteful number, since it uses less digits than its factorization.

6656656005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272618 (or 272612 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 45.

The square root of 6656656005 is about 81588.3325298415. The cubic root of 6656656005 is about 1881.1295465163.

The spelling of 6656656005 in words is "six billion, six hundred fifty-six million, six hundred fifty-six thousand, five".