6366872661 has 16 divisors (see below), whose sum is σ = 8560060800. Its totient is φ = 4209226560.

The previous prime is 6366872641. The next prime is 6366872663. The reversal of 6366872661 is 1662786636.

It is not a de Polignac number, because 6366872661 - 2²³ = 6358484053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6366872663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270771 + ... + 293343.

It is an arithmetic number, because the mean of its divisors is an integer number (535003800).

Almost surely, 2^6366872661 is an apocalyptic number.

It is an amenable number.

6366872661 is a deficient number, since it is larger than the sum of its proper divisors (2193188139).

6366872661 is a wasteful number, since it uses less digits than its factorization.

6366872661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23356.

The product of its digits is 2612736, while the sum is 51.

The square root of 6366872661 is about 79792.6855106406. The cubic root of 6366872661 is about 1853.4265844216.

The spelling of 6366872661 in words is "six billion, three hundred sixty-six million, eight hundred seventy-two thousand, six hundred sixty-one".