669474788 has 6 divisors (see below), whose sum is σ = 1171580886. Its totient is φ = 334737392.

The previous prime is 669474779. The next prime is 669474809. The reversal of 669474788 is 887474966.

It can be written as a sum of positive squares in only one way, i.e., 663989824 + 5484964 = 25768^2 + 2342^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83684345 + ... + 83684352.

It is an arithmetic number, because the mean of its divisors is an integer number (195263481).

Almost surely, 2^669474788 is an apocalyptic number.

It is an amenable number.

669474788 is a deficient number, since it is larger than the sum of its proper divisors (502106098).

669474788 is a wasteful number, since it uses less digits than its factorization.

669474788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167368701 (or 167368699 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 59.

The square root of 669474788 is about 25874.2108671936. The cubic root of 669474788 is about 874.8053065602.

The spelling of 669474788 in words is "six hundred sixty-nine million, four hundred seventy-four thousand, seven hundred eighty-eight".