669451000 has 32 divisors (see below), whose sum is σ = 1566517680. Its totient is φ = 267780000.

The previous prime is 669450967. The next prime is 669451001. The reversal of 669451000 is 154966.

669451000 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669451001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333726 + ... + 335725.

Almost surely, 2^669451000 is an apocalyptic number.

It is an amenable number.

669451000 is an abundant number, since it is smaller than the sum of its proper divisors (897066680).

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

669451000 is a wasteful number, since it uses less digits than its factorization.

669451000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669472 (or 669458 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 669451000 is about 25873.7511775931. The cubic root of 669451000 is about 874.7949451468.

The spelling of 669451000 in words is "six hundred sixty-nine million, four hundred fifty-one thousand".