669731058 has 32 divisors (see below), whose sum is σ = 1494547200. Its totient is φ = 222305328.

The previous prime is 669731033. The next prime is 669731087. The reversal of 669731058 is 850137966.

It is a happy number.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13041 + ... + 38852.

It is an arithmetic number, because the mean of its divisors is an integer number (46704600).

Almost surely, 2^669731058 is an apocalyptic number.

669731058 is an abundant number, since it is smaller than the sum of its proper divisors (824816142).

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

669731058 is a wasteful number, since it uses less digits than its factorization.

669731058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52143 (or 52137 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 669731058 is about 25879.1626216924. The cubic root of 669731058 is about 874.9169153219.

The spelling of 669731058 in words is "six hundred sixty-nine million, seven hundred thirty-one thousand, fifty-eight".