166883015641 has 4 divisors (see below), whose sum is σ = 166911582672. Its totient is φ = 166854448612.

The previous prime is 166883015623. The next prime is 166883015683. The reversal of 166883015641 is 146510388661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166883015641 - 2¹⁵ = 166882982873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166883010641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14274751 + ... + 14286436.

It is an arithmetic number, because the mean of its divisors is an integer number (41727895668).

Almost surely, 2^166883015641 is an apocalyptic number.

It is an amenable number.

166883015641 is a deficient number, since it is larger than the sum of its proper divisors (28567031).

166883015641 is an equidigital number, since it uses as much as digits as its factorization.

166883015641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28567030.

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 166883015641 in words is "one hundred sixty-six billion, eight hundred eighty-three million, fifteen thousand, six hundred forty-one".