669166900 has 36 divisors (see below), whose sum is σ = 1453215148. Its totient is φ = 267459840.

The previous prime is 669166879. The next prime is 669166907. The reversal of 669166900 is 9661966.

It can be written as a sum of positive squares in 6 ways, for example, as 12475024 + 656691876 = 3532^2 + 25626^2 .

It is a super-2 number, since 2×669166900² = 895568680111220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669166907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 254392 + ... + 257008.

Almost surely, 2^669166900 is an apocalyptic number.

It is an amenable number.

669166900 is an abundant number, since it is smaller than the sum of its proper divisors (784048248).

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

669166900 is a wasteful number, since it uses less digits than its factorization.

669166900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5188 (or 5181 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 669166900 is about 25868.2604749527. The cubic root of 669166900 is about 874.6711798480.

The spelling of 669166900 in words is "six hundred sixty-nine million, one hundred sixty-six thousand, nine hundred".