668137500459 has 48 divisors (see below), whose sum is σ = 1143843049440. Its totient is φ = 370475320320.

The previous prime is 668137500421. The next prime is 668137500463. The reversal of 668137500459 is 954005731866.

668137500459 is a `hidden beast` number, since 6 + 6 + 8 + 137 + 50 + 0 + 459 = 666.

It is not a de Polignac number, because 668137500459 - 2⁸ = 668137500203 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (668137500409) 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 in 47 ways as a sum of consecutive naturals, for example, 2151664 + ... + 2442525.

It is an arithmetic number, because the mean of its divisors is an integer number (23830063530).

Almost surely, 2^668137500459 is an apocalyptic number.

668137500459 is a deficient number, since it is larger than the sum of its proper divisors (475705548981).

668137500459 is a wasteful number, since it uses less digits than its factorization.

668137500459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4594332 (or 4594329 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 54.

The spelling of 668137500459 in words is "six hundred sixty-eight billion, one hundred thirty-seven million, five hundred thousand, four hundred fifty-nine".