6636772731 has 16 divisors (see below), whose sum is σ = 9087012864. Its totient is φ = 4306839264.

The previous prime is 6636772717. The next prime is 6636772741. The reversal of 6636772731 is 1372776366.

It is not a de Polignac number, because 6636772731 - 2²² = 6632578427 is a prime.

It is a super-2 number, since 2×6636772731² = 88093504565890396722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6636772741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144141 + ... + 184526.

It is an arithmetic number, because the mean of its divisors is an integer number (567938304).

Almost surely, 2^6636772731 is an apocalyptic number.

6636772731 is a deficient number, since it is larger than the sum of its proper divisors (2450240133).

6636772731 is a wasteful number, since it uses less digits than its factorization.

6636772731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328850.

The product of its digits is 1333584, while the sum is 48.

The square root of 6636772731 is about 81466.3901925205. The cubic root of 6636772731 is about 1879.2547154332.

The spelling of 6636772731 in words is "six billion, six hundred thirty-six million, seven hundred seventy-two thousand, seven hundred thirty-one".