6687338631 has 16 divisors (see below), whose sum is σ = 9218746368. Its totient is φ = 4307536800.

The previous prime is 6687338627. The next prime is 6687338633. The reversal of 6687338631 is 1368337866.

It is a happy number.

It is not a de Polignac number, because 6687338631 - 2² = 6687338627 is a prime.

It is a super-2 number, since 2×6687338631² = 89440995931329908322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6687338633) 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, 1705 + ... + 115661.

It is an arithmetic number, because the mean of its divisors is an integer number (576171648).

Almost surely, 2^6687338631 is an apocalyptic number.

6687338631 is a deficient number, since it is larger than the sum of its proper divisors (2531407737).

6687338631 is a wasteful number, since it uses less digits than its factorization.

6687338631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114622.

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

The square root of 6687338631 is about 81776.1495241736. The cubic root of 6687338631 is about 1884.0153568760.

The spelling of 6687338631 in words is "six billion, six hundred eighty-seven million, three hundred thirty-eight thousand, six hundred thirty-one".