166517662715 has 8 divisors (see below), whose sum is σ = 199855207968. Its totient is φ = 133191455040.

The previous prime is 166517662691. The next prime is 166517662721. The reversal of 166517662715 is 517266715661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166517662715 - 2⁸ = 166517662459 is a prime.

It is a Duffinian number.

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, 2802047 + ... + 2860856.

It is an arithmetic number, because the mean of its divisors is an integer number (24981900996).

Almost surely, 2^166517662715 is an apocalyptic number.

166517662715 is a deficient number, since it is larger than the sum of its proper divisors (33337545253).

166517662715 is an equidigital number, since it uses as much as digits as its factorization.

166517662715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5668789.

The product of its digits is 3175200, while the sum is 53.

The spelling of 166517662715 in words is "one hundred sixty-six billion, five hundred seventeen million, six hundred sixty-two thousand, seven hundred fifteen".