669331892 has 6 divisors (see below), whose sum is σ = 1171330818. Its totient is φ = 334665944.

The previous prime is 669331891. The next prime is 669331921. The reversal of 669331892 is 298133966.

It can be written as a sum of positive squares in only one way, i.e., 577248676 + 92083216 = 24026^2 + 9596^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669331891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83666483 + ... + 83666490.

It is an arithmetic number, because the mean of its divisors is an integer number (195221803).

Almost surely, 2^669331892 is an apocalyptic number.

It is an amenable number.

669331892 is a deficient number, since it is larger than the sum of its proper divisors (501998926).

669331892 is a wasteful number, since it uses less digits than its factorization.

669331892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167332977 (or 167332975 counting only the distinct ones).

The product of its digits is 419904, while the sum is 47.

The square root of 669331892 is about 25871.4493602504. The cubic root of 669331892 is about 874.7430612118.

The spelling of 669331892 in words is "six hundred sixty-nine million, three hundred thirty-one thousand, eight hundred ninety-two".