669079402 has 8 divisors (see below), whose sum is σ = 1004149476. Its totient is φ = 334362912.

The previous prime is 669079393. The next prime is 669079447. The reversal of 669079402 is 204970966.

It can be written as a sum of positive squares in 2 ways, for example, as 537266041 + 131813361 = 23179^2 + 11481^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 83613 + ... + 91264.

Almost surely, 2^669079402 is an apocalyptic number.

669079402 is a deficient number, since it is larger than the sum of its proper divisors (335070074).

669079402 is a wasteful number, since it uses less digits than its factorization.

669079402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176792.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 669079402 is about 25866.5691965518. The cubic root of 669079402 is about 874.6330551715.

The spelling of 669079402 in words is "six hundred sixty-nine million, seventy-nine thousand, four hundred two".