668336031 has 12 divisors (see below), whose sum is σ = 1053135720. Its totient is φ = 405052080.

The previous prime is 668336027. The next prime is 668336101. The reversal of 668336031 is 130633866.

It is not a de Polignac number, because 668336031 - 2² = 668336027 is a prime.

It is a super-2 number, since 2×668336031² = 893346100665665922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668336131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3375336 + ... + 3375533.

It is an arithmetic number, because the mean of its divisors is an integer number (87761310).

Almost surely, 2^668336031 is an apocalyptic number.

668336031 is a deficient number, since it is larger than the sum of its proper divisors (384799689).

668336031 is a wasteful number, since it uses less digits than its factorization.

668336031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6750886 (or 6750883 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 668336031 is about 25852.1958641814. The cubic root of 668336031 is about 874.3090189981.

Adding to 668336031 its reverse (130633866), we get a palindrome (798969897).

The spelling of 668336031 in words is "six hundred sixty-eight million, three hundred thirty-six thousand, thirty-one".