669925256 has 384 divisors, whose sum is σ = 1964995200. Its totient is φ = 209018880.

The previous prime is 669925253. The next prime is 669925261. The reversal of 669925256 is 652529966.

It is not an unprimeable number, because it can be changed into a prime (669925253) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18106070 + ... + 18106106.

It is an arithmetic number, because the mean of its divisors is an integer number (5117175).

Almost surely, 2^669925256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669925256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (982497600).

669925256 is an abundant number, since it is smaller than the sum of its proper divisors (1295069944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669925256 is a wasteful number, since it uses less digits than its factorization.

669925256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 106 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 50.

The square root of 669925256 is about 25882.9143644992. The cubic root of 669925256 is about 875.0014719975.

The spelling of 669925256 in words is "six hundred sixty-nine million, nine hundred twenty-five thousand, two hundred fifty-six".