668500122 has 16 divisors (see below), whose sum is σ = 1345975200. Its totient is φ = 221337552.

The previous prime is 668500081. The next prime is 668500171. The reversal of 668500122 is 221005866.

It is a super-2 number, since 2×668500122² = 893784826228029768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 668500122.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 372988 + ... + 374775.

It is an arithmetic number, because the mean of its divisors is an integer number (84123450).

Almost surely, 2^668500122 is an apocalyptic number.

668500122 is an abundant number, since it is smaller than the sum of its proper divisors (677475078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668500122 is a wasteful number, since it uses less digits than its factorization.

668500122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747917.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 668500122 is about 25855.3693069737. The cubic root of 668500122 is about 874.3805670891.

Adding to 668500122 its reverse (221005866), we get a palindrome (889505988).

The spelling of 668500122 in words is "six hundred sixty-eight million, five hundred thousand, one hundred twenty-two".