6660651272 has 32 divisors (see below), whose sum is σ = 14425477920. Its totient is φ = 2849475840.

The previous prime is 6660651211. The next prime is 6660651287. The reversal of 6660651272 is 2721560666.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2224658 + ... + 2227649.

It is an arithmetic number, because the mean of its divisors is an integer number (450796185).

Almost surely, 2^6660651272 is an apocalyptic number.

It is an amenable number.

6660651272 is an abundant number, since it is smaller than the sum of its proper divisors (7764826648).

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

6660651272 is a wasteful number, since it uses less digits than its factorization.

6660651272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4452341 (or 4452337 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 6660651272 is about 81612.8131606796. The cubic root of 6660651272 is about 1881.5058171089.

The spelling of 6660651272 in words is "six billion, six hundred sixty million, six hundred fifty-one thousand, two hundred seventy-two".