669042158 has 8 divisors (see below), whose sum is σ = 1004603952. Its totient is φ = 334174176.

The previous prime is 669042137. The next prime is 669042163. The reversal of 669042158 is 851240966.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 171035 + ... + 174902.

It is an arithmetic number, because the mean of its divisors is an integer number (125575494).

Almost surely, 2^669042158 is an apocalyptic number.

669042158 is a deficient number, since it is larger than the sum of its proper divisors (335561794).

669042158 is a wasteful number, since it uses less digits than its factorization.

669042158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346906.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 669042158 is about 25865.8492611397. The cubic root of 669042158 is about 874.6168261869.

The spelling of 669042158 in words is "six hundred sixty-nine million, forty-two thousand, one hundred fifty-eight".