669490576 has 10 divisors (see below), whose sum is σ = 1297138022. Its totient is φ = 334745280.

The previous prime is 669490573. The next prime is 669490579. The reversal of 669490576 is 675094966.

It is an interprime number because it is at equal distance from previous prime (669490573) and next prime (669490579).

It can be written as a sum of positive squares in only one way, i.e., 445210000 + 224280576 = 21100^2 + 14976^2 .

It is not an unprimeable number, because it can be changed into a prime (669490571) 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 as a sum of consecutive naturals, namely, 20921565 + ... + 20921596.

Almost surely, 2^669490576 is an apocalyptic number.

It is an amenable number.

669490576 is a deficient number, since it is larger than the sum of its proper divisors (627647446).

669490576 is a wasteful number, since it uses less digits than its factorization.

669490576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41843169 (or 41843163 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 52.

The square root of 669490576 is about 25874.5159568252. The cubic root of 669490576 is about 874.8121832531.

The spelling of 669490576 in words is "six hundred sixty-nine million, four hundred ninety thousand, five hundred seventy-six".