669108839 has 8 divisors (see below), whose sum is σ = 764916768. Its totient is φ = 573356160.

The previous prime is 669108827. The next prime is 669108841. The reversal of 669108839 is 938801966.

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

It is a cyclic number.

It is not a de Polignac number, because 669108839 - 2⁴ = 669108823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669108809) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 16619 + ... + 40179.

It is an arithmetic number, because the mean of its divisors is an integer number (95614596).

Almost surely, 2^669108839 is an apocalyptic number.

669108839 is a deficient number, since it is larger than the sum of its proper divisors (95807929).

669108839 is a wasteful number, since it uses less digits than its factorization.

669108839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27625.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 669108839 is about 25867.1382066127. The cubic root of 669108839 is about 874.6458818483.

The spelling of 669108839 in words is "six hundred sixty-nine million, one hundred eight thousand, eight hundred thirty-nine".