166515051066501 has 8 divisors (see below), whose sum is σ = 222082485889824. Its totient is φ = 110978825143760.

The previous prime is 166515051066437. The next prime is 166515051066601. The reversal of 166515051066501 is 105660150515661.

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

It is a cyclic number.

It is not a de Polignac number, because 166515051066501 - 2⁶ = 166515051066437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166515051066601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7802212695 + ... + 7802234036.

It is an arithmetic number, because the mean of its divisors is an integer number (27760310736228).

Almost surely, 2^{166515051066501} is an apocalyptic number.

It is an amenable number.

166515051066501 is a deficient number, since it is larger than the sum of its proper divisors (55567434823323).

166515051066501 is a wasteful number, since it uses less digits than its factorization.

166515051066501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15604450291.

The product of its (nonzero) digits is 810000, while the sum is 48.

The spelling of 166515051066501 in words is "one hundred sixty-six trillion, five hundred fifteen billion, fifty-one million, sixty-six thousand, five hundred one".