669156604 has 24 divisors (see below), whose sum is σ = 1194569600. Its totient is φ = 327902256.

The previous prime is 669156589. The next prime is 669156629. The reversal of 669156604 is 406651966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47059 + ... + 59605.

Almost surely, 2^669156604 is an apocalyptic number.

It is an amenable number.

669156604 is a deficient number, since it is larger than the sum of its proper divisors (525412996).

669156604 is a wasteful number, since it uses less digits than its factorization.

669156604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12817 (or 12815 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 669156604 is about 25868.0614658308. The cubic root of 669156604 is about 874.6666938418. Note that the first 4 decimals are identical.

The spelling of 669156604 in words is "six hundred sixty-nine million, one hundred fifty-six thousand, six hundred four".