6660899992 has 16 divisors (see below), whose sum is σ = 12492689040. Its totient is φ = 3329516256.

The previous prime is 6660899969. The next prime is 6660900007. The reversal of 6660899992 is 2999980666.

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, 85923 + ... + 143890.

It is an arithmetic number, because the mean of its divisors is an integer number (780793065).

Almost surely, 2^6660899992 is an apocalyptic number.

It is an amenable number.

6660899992 is a deficient number, since it is larger than the sum of its proper divisors (5831789048).

6660899992 is a wasteful number, since it uses less digits than its factorization.

6660899992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233442 (or 233438 counting only the distinct ones).

The product of its (nonzero) digits is 22674816, while the sum is 64.

The square root of 6660899992 is about 81614.3369267925. The cubic root of 6660899992 is about 1881.5292363554.

The spelling of 6660899992 in words is "six billion, six hundred sixty million, eight hundred ninety-nine thousand, nine hundred ninety-two".