6686629031 has 2 divisors, whose sum is σ = 6686629032. Its totient is φ = 6686629030.

The previous prime is 6686629003. The next prime is 6686629051. The reversal of 6686629031 is 1309266866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6686629031 - 2¹⁸ = 6686366887 is a prime.

It is a super-2 number, since 2×6686629031² = 89422015596423997922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6686629051) 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 as a sum of consecutive naturals, namely, 3343314515 + 3343314516.

It is an arithmetic number, because the mean of its divisors is an integer number (3343314516).

Almost surely, 2^6686629031 is an apocalyptic number.

6686629031 is a deficient number, since it is larger than the sum of its proper divisors (1).

6686629031 is an equidigital number, since it uses as much as digits as its factorization.

6686629031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 47.

The square root of 6686629031 is about 81771.8107357297. The cubic root of 6686629031 is about 1883.9487162855.

The spelling of 6686629031 in words is "six billion, six hundred eighty-six million, six hundred twenty-nine thousand, thirty-one".