68766631 has 2 divisors, whose sum is σ = 68766632. Its totient is φ = 68766630.

The previous prime is 68766623. The next prime is 68766641. The reversal of 68766631 is 13666786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68766631 - 2³ = 68766623 is a prime.

It is a super-2 number, since 2×68766631² = 9457699078180322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68766641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34383315 + 34383316.

It is an arithmetic number, because the mean of its divisors is an integer number (34383316).

Almost surely, 2^68766631 is an apocalyptic number.

68766631 is a deficient number, since it is larger than the sum of its proper divisors (1).

68766631 is an equidigital number, since it uses as much as digits as its factorization.

68766631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 43.

The square root of 68766631 is about 8292.5648022792. The cubic root of 68766631 is about 409.6936656845.

The spelling of 68766631 in words is "sixty-eight million, seven hundred sixty-six thousand, six hundred thirty-one".