668756582 has 16 divisors (see below), whose sum is σ = 1082011392. Its totient is φ = 308167680.

The previous prime is 668756581. The next prime is 668756587. The reversal of 668756582 is 285657866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668756581) by changing a digit.

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, 3398 + ... + 36729.

It is an arithmetic number, because the mean of its divisors is an integer number (67625712).

Almost surely, 2^668756582 is an apocalyptic number.

668756582 is a deficient number, since it is larger than the sum of its proper divisors (413254810).

668756582 is a wasteful number, since it uses less digits than its factorization.

668756582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40783.

The product of its digits is 4838400, while the sum is 53.

The square root of 668756582 is about 25860.3283428498. The cubic root of 668756582 is about 874.4923671038.

The spelling of 668756582 in words is "six hundred sixty-eight million, seven hundred fifty-six thousand, five hundred eighty-two".