636672222166 has 8 divisors (see below), whose sum is σ = 961417785600. Its totient is φ = 316199626968.

The previous prime is 636672222157. The next prime is 636672222239. The reversal of 636672222166 is 661222276636.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1068241686 + ... + 1068242281.

It is an arithmetic number, because the mean of its divisors is an integer number (120177223200).

Almost surely, 2^636672222166 is an apocalyptic number.

636672222166 is a deficient number, since it is larger than the sum of its proper divisors (324745563434).

636672222166 is a wasteful number, since it uses less digits than its factorization.

636672222166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136484118.

The product of its digits is 2612736, while the sum is 49.

The spelling of 636672222166 in words is "six hundred thirty-six billion, six hundred seventy-two million, two hundred twenty-two thousand, one hundred sixty-six".