668808802 has 8 divisors (see below), whose sum is σ = 1022141916. Its totient is φ = 328094832.

The previous prime is 668808733. The next prime is 668808809. The reversal of 668808802 is 208808866.

It can be written as a sum of positive squares in 2 ways, for example, as 564585121 + 104223681 = 23761^2 + 10209^2 .

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

It is not an unprimeable number, because it can be changed into a prime (668808809) 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 3 ways as a sum of consecutive naturals, for example, 3154653 + ... + 3154864.

Almost surely, 2^668808802 is an apocalyptic number.

668808802 is a deficient number, since it is larger than the sum of its proper divisors (353333114).

668808802 is a wasteful number, since it uses less digits than its factorization.

668808802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6309572.

The product of its (nonzero) digits is 294912, while the sum is 46.

The square root of 668808802 is about 25861.3379777613. The cubic root of 668808802 is about 874.5151281522.

The spelling of 668808802 in words is "six hundred sixty-eight million, eight hundred eight thousand, eight hundred two".