668839074 has 16 divisors (see below), whose sum is σ = 1380829440. Its totient is φ = 215754480.

The previous prime is 668839063. The next prime is 668839117. The reversal of 668839074 is 470938866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1797769 + ... + 1798140.

It is an arithmetic number, because the mean of its divisors is an integer number (86301840).

Almost surely, 2^668839074 is an apocalyptic number.

668839074 is an abundant number, since it is smaller than the sum of its proper divisors (711990366).

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

668839074 is a wasteful number, since it uses less digits than its factorization.

668839074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3595945.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The square root of 668839074 is about 25861.9232463481. The cubic root of 668839074 is about 874.5283222183.

It can be divided in two parts, 66883 and 9074, that added together give a palindrome (75957).

The spelling of 668839074 in words is "six hundred sixty-eight million, eight hundred thirty-nine thousand, seventy-four".