668876576 has 12 divisors (see below), whose sum is σ = 1316850822. Its totient is φ = 334438272.

The previous prime is 668876519. The next prime is 668876617. The reversal of 668876576 is 675678866.

It can be written as a sum of positive squares in only one way, i.e., 402403600 + 266472976 = 20060^2 + 16324^2 .

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 as a sum of consecutive naturals, namely, 10451165 + ... + 10451228.

Almost surely, 2^668876576 is an apocalyptic number.

It is an amenable number.

668876576 is a deficient number, since it is larger than the sum of its proper divisors (647974246).

668876576 is a wasteful number, since it uses less digits than its factorization.

668876576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20902403 (or 20902395 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 59.

The square root of 668876576 is about 25862.6482789369. The cubic root of 668876576 is about 874.5446669313.

The spelling of 668876576 in words is "six hundred sixty-eight million, eight hundred seventy-six thousand, five hundred seventy-six".