166827794377 has 4 divisors (see below), whose sum is σ = 167371207696. Its totient is φ = 166284381060.

The previous prime is 166827794347. The next prime is 166827794387. The reversal of 166827794377 is 773497728661.

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, and also an emirpimes, since its reverse is a distinct semiprime: 773497728661 = 7 ⋅110499675523.

It is a cyclic number.

It is not a de Polignac number, because 166827794377 - 2³⁵ = 132468056009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166827794347) 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 3 ways as a sum of consecutive naturals, for example, 271706199 + ... + 271706812.

It is an arithmetic number, because the mean of its divisors is an integer number (41842801924).

Almost surely, 2^166827794377 is an apocalyptic number.

It is an amenable number.

166827794377 is a deficient number, since it is larger than the sum of its proper divisors (543413319).

166827794377 is an equidigital number, since it uses as much as digits as its factorization.

166827794377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543413318.

The product of its digits is 149361408, while the sum is 67.

The spelling of 166827794377 in words is "one hundred sixty-six billion, eight hundred twenty-seven million, seven hundred ninety-four thousand, three hundred seventy-seven".