669257108 has 48 divisors (see below), whose sum is σ = 1295281680. Its totient is φ = 300672000.

The previous prime is 669257101. The next prime is 669257131. The reversal of 669257108 is 801752966.

It can be written as a sum of positive squares in 8 ways, for example, as 103684 + 669153424 = 322^2 + 25868^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669257101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319328 + ... + 321416.

It is an arithmetic number, because the mean of its divisors is an integer number (26985035).

Almost surely, 2^669257108 is an apocalyptic number.

It is an amenable number.

669257108 is a deficient number, since it is larger than the sum of its proper divisors (626024572).

669257108 is a wasteful number, since it uses less digits than its factorization.

669257108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268 (or 2266 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 669257108 is about 25870.0040201002. The cubic root of 669257108 is about 874.7104818481.

The spelling of 669257108 in words is "six hundred sixty-nine million, two hundred fifty-seven thousand, one hundred eight".