166918005136 has 15 divisors (see below), whose sum is σ = 323406801291. Its totient is φ = 83458185456.

The previous prime is 166918005113. The next prime is 166918005143. The reversal of 166918005136 is 631500819661.

The square root of 166918005136 is 408556.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian 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 2 ways as a sum of consecutive naturals, for example, 1583155 + ... + 1685293.

Almost surely, 2^166918005136 is an apocalyptic number.

166918005136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

166918005136 is the 408556-th square number.

It is an amenable number.

166918005136 is a deficient number, since it is larger than the sum of its proper divisors (156488796155).

166918005136 is an frugal number, since it uses more digits than its factorization.

166918005136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204286 (or 102141 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 166918005136 in words is "one hundred sixty-six billion, nine hundred eighteen million, five thousand, one hundred thirty-six".