166913844806 has 4 divisors (see below), whose sum is σ = 250370767212. Its totient is φ = 83456922402.

The previous prime is 166913844791. The next prime is 166913844821. The reversal of 166913844806 is 608448319661.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (166913844791) and next prime (166913844821).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41728461200 + ... + 41728461203.

It is an arithmetic number, because the mean of its divisors is an integer number (62592691803).

Almost surely, 2^166913844806 is an apocalyptic number.

166913844806 is a deficient number, since it is larger than the sum of its proper divisors (83456922406).

166913844806 is an equidigital number, since it uses as much as digits as its factorization.

166913844806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83456922405.

The product of its (nonzero) digits is 5971968, while the sum is 56.

The spelling of 166913844806 in words is "one hundred sixty-six billion, nine hundred thirteen million, eight hundred forty-four thousand, eight hundred six".