669317788 has 24 divisors (see below), whose sum is σ = 1259193600. Its totient is φ = 310297968.

The previous prime is 669317729. The next prime is 669317791. The reversal of 669317788 is 887713966.

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, 90118 + ... + 97261.

It is an arithmetic number, because the mean of its divisors is an integer number (52466400).

Almost surely, 2^669317788 is an apocalyptic number.

It is an amenable number.

669317788 is a deficient number, since it is larger than the sum of its proper divisors (589875812).

669317788 is a wasteful number, since it uses less digits than its factorization.

669317788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187449 (or 187447 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 55.

The square root of 669317788 is about 25871.1767803477. The cubic root of 669317788 is about 874.7369170438.

The spelling of 669317788 in words is "six hundred sixty-nine million, three hundred seventeen thousand, seven hundred eighty-eight".