166715970805 has 16 divisors (see below), whose sum is σ = 205129822464. Its totient is φ = 130014952000.

The previous prime is 166715970797. The next prime is 166715970809. The reversal of 166715970805 is 508079517661.

It is a happy number.

It is not a de Polignac number, because 166715970805 - 2³ = 166715970797 is a prime.

It is a super-2 number, since 2×166715970805² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166715970809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1354222 + ... + 1472191.

It is an arithmetic number, because the mean of its divisors is an integer number (12820613904).

Almost surely, 2^166715970805 is an apocalyptic number.

It is an amenable number.

166715970805 is a deficient number, since it is larger than the sum of its proper divisors (38413851659).

166715970805 is a wasteful number, since it uses less digits than its factorization.

166715970805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2826716.

The product of its (nonzero) digits is 3175200, while the sum is 55.

The spelling of 166715970805 in words is "one hundred sixty-six billion, seven hundred fifteen million, nine hundred seventy thousand, eight hundred five".