668964885 has 8 divisors (see below), whose sum is σ = 1070343840. Its totient is φ = 356781264.

The previous prime is 668964871. The next prime is 668964929. The reversal of 668964885 is 588469866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 668964885 - 2⁸ = 668964629 is a prime.

It is a Curzon number.

It is a congruent number.

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, 22298815 + ... + 22298844.

It is an arithmetic number, because the mean of its divisors is an integer number (133792980).

Almost surely, 2^668964885 is an apocalyptic number.

It is an amenable number.

668964885 is a deficient number, since it is larger than the sum of its proper divisors (401378955).

668964885 is a wasteful number, since it uses less digits than its factorization.

668964885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44597667.

The product of its digits is 19906560, while the sum is 60.

The square root of 668964885 is about 25864.3554916801. The cubic root of 668964885 is about 874.5831527393.

The spelling of 668964885 in words is "six hundred sixty-eight million, nine hundred sixty-four thousand, eight hundred eighty-five".