669255900 has 72 divisors (see below), whose sum is σ = 1998872064. Its totient is φ = 172708800.

The previous prime is 669255883. The next prime is 669255907. The reversal of 669255900 is 9552966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669255907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26682 + ... + 45281.

It is an arithmetic number, because the mean of its divisors is an integer number (27762112).

Almost surely, 2^669255900 is an apocalyptic number.

669255900 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

669255900 is an abundant number, since it is smaller than the sum of its proper divisors (1329616164).

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

669255900 is a wasteful number, since it uses less digits than its factorization.

669255900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72011 (or 72004 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 42.

The square root of 669255900 is about 25869.9806725865. The cubic root of 669255900 is about 874.7099555676.

The spelling of 669255900 in words is "six hundred sixty-nine million, two hundred fifty-five thousand, nine hundred".