166671327165 has 64 divisors (see below), whose sum is σ = 308784537600. Its totient is φ = 75190063104.

The previous prime is 166671327107. The next prime is 166671327167. The reversal of 166671327165 is 561723176661.

It is not a de Polignac number, because 166671327165 - 2⁶ = 166671327101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166671327167) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 22251741 + ... + 22259229.

It is an arithmetic number, because the mean of its divisors is an integer number (4824758400).

Almost surely, 2^166671327165 is an apocalyptic number.

166671327165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166671327165 is a deficient number, since it is larger than the sum of its proper divisors (142113210435).

166671327165 is a wasteful number, since it uses less digits than its factorization.

166671327165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10266.

The product of its digits is 1905120, while the sum is 51.

The spelling of 166671327165 in words is "one hundred sixty-six billion, six hundred seventy-one million, three hundred twenty-seven thousand, one hundred sixty-five".