669567376 has 15 divisors (see below), whose sum is σ = 1297487361. Its totient is φ = 334731936.

The previous prime is 669567359. The next prime is 669567397. The reversal of 669567376 is 673765966.

The square root of 669567376 is 25876.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 34527376 + 635040000 = 5876^2 + 25200^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 100270 + ... + 106738.

Almost surely, 2^669567376 is an apocalyptic number.

669567376 is the 25876-th square number.

It is an amenable number.

669567376 is a deficient number, since it is larger than the sum of its proper divisors (627919985).

669567376 is an frugal number, since it uses more digits than its factorization.

669567376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12946 (or 6471 counting only the distinct ones).

The product of its digits is 8573040, while the sum is 55.

The cubic root of 669567376 is about 874.8456330676.

The spelling of 669567376 in words is "six hundred sixty-nine million, five hundred sixty-seven thousand, three hundred seventy-six".