668246708831 has 16 divisors (see below), whose sum is σ = 721697558400. Its totient is φ = 615089832960.

The previous prime is 668246708803. The next prime is 668246708879. The reversal of 668246708831 is 138807642866.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 668246708831 - 2³⁸ = 393368801887 is a prime.

It is a super-2 number, since 2×668246708831² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668246702831) 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 15 ways as a sum of consecutive naturals, for example, 11024495 + ... + 11084943.

It is an arithmetic number, because the mean of its divisors is an integer number (45106097400).

Almost surely, 2^668246708831 is an apocalyptic number.

668246708831 is a deficient number, since it is larger than the sum of its proper divisors (53450849569).

668246708831 is a wasteful number, since it uses less digits than its factorization.

668246708831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62866.

The product of its (nonzero) digits is 18579456, while the sum is 59.

The spelling of 668246708831 in words is "six hundred sixty-eight billion, two hundred forty-six million, seven hundred eight thousand, eight hundred thirty-one".