6651316631 has 4 divisors (see below), whose sum is σ = 6865875264. Its totient is φ = 6436758000.

The previous prime is 6651316619. The next prime is 6651316667. The reversal of 6651316631 is 1366131566.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6651316631 - 2¹⁴ = 6651300247 is a prime.

It is a super-2 number, since 2×6651316631² = 88480025851634380322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6651315631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107279270 + ... + 107279331.

It is an arithmetic number, because the mean of its divisors is an integer number (1716468816).

Almost surely, 2^6651316631 is an apocalyptic number.

6651316631 is a deficient number, since it is larger than the sum of its proper divisors (214558633).

6651316631 is a wasteful number, since it uses less digits than its factorization.

6651316631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214558632.

The product of its digits is 58320, while the sum is 38.

The square root of 6651316631 is about 81555.6045345751. The cubic root of 6651316631 is about 1880.6264540296.

The spelling of 6651316631 in words is "six billion, six hundred fifty-one million, three hundred sixteen thousand, six hundred thirty-one".