166996203986 has 16 divisors (see below), whose sum is σ = 270109395360. Its totient is φ = 77174111520.

The previous prime is 166996203953. The next prime is 166996204033. The reversal of 166996203986 is 689302699661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53591576 + ... + 53594691.

It is an arithmetic number, because the mean of its divisors is an integer number (16881837210).

Almost surely, 2^166996203986 is an apocalyptic number.

166996203986 is a deficient number, since it is larger than the sum of its proper divisors (103113191374).

166996203986 is a wasteful number, since it uses less digits than its factorization.

166996203986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107186329.

The product of its (nonzero) digits is 45349632, while the sum is 65.

The spelling of 166996203986 in words is "one hundred sixty-six billion, nine hundred ninety-six million, two hundred three thousand, nine hundred eighty-six".