6660808156 has 12 divisors (see below), whose sum is σ = 11657023168. Its totient is φ = 3330230112.

The previous prime is 6660808111. The next prime is 6660808213. The reversal of 6660808156 is 6518080666.

It is a super-2 number, since 2×6660808156² = 88732730582072240672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84520 + ... + 143056.

Almost surely, 2^6660808156 is an apocalyptic number.

It is an amenable number.

6660808156 is a deficient number, since it is larger than the sum of its proper divisors (4996215012).

6660808156 is a wasteful number, since it uses less digits than its factorization.

6660808156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86988 (or 86986 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 6660808156 is about 81613.7743031163. The cubic root of 6660808156 is about 1881.5205892300.

The spelling of 6660808156 in words is "six billion, six hundred sixty million, eight hundred eight thousand, one hundred fifty-six".