668906582 has 16 divisors (see below), whose sum is σ = 1065551760. Its totient is φ = 313840128.

The previous prime is 668906527. The next prime is 668906591. The reversal of 668906582 is 285609866.

It is a self number, because there is not a number n which added to its sum of digits gives 668906582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17732 + ... + 40647.

It is an arithmetic number, because the mean of its divisors is an integer number (66596985).

Almost surely, 2^668906582 is an apocalyptic number.

668906582 is a deficient number, since it is larger than the sum of its proper divisors (396645178).

668906582 is a wasteful number, since it uses less digits than its factorization.

668906582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58735.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The square root of 668906582 is about 25863.2283754368. The cubic root of 668906582 is about 874.5577441795.

The spelling of 668906582 in words is "six hundred sixty-eight million, nine hundred six thousand, five hundred eighty-two".