639316166 has 8 divisors (see below), whose sum is σ = 960159144. Its totient is φ = 319263120.

The previous prime is 639316133. The next prime is 639316187. The reversal of 639316166 is 661613936.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195455 + ... + 198698.

It is an arithmetic number, because the mean of its divisors is an integer number (120019893).

Almost surely, 2^639316166 is an apocalyptic number.

639316166 is a deficient number, since it is larger than the sum of its proper divisors (320842978).

639316166 is a wasteful number, since it uses less digits than its factorization.

639316166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394966.

The product of its digits is 104976, while the sum is 41.

The square root of 639316166 is about 25284.7022129983. The cubic root of 639316166 is about 861.4668341939.

The spelling of 639316166 in words is "six hundred thirty-nine million, three hundred sixteen thousand, one hundred sixty-six".