166793774231 has 8 divisors (see below), whose sum is σ = 191524877184. Its totient is φ = 142288526520.

The previous prime is 166793774197. The next prime is 166793774233. The reversal of 166793774231 is 132477397661.

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

It is a de Polignac number, because none of the positive numbers 2^k-166793774231 is a prime.

It is a super-2 number, since 2×166793774231² (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 (166793774233) 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, 56462225 + ... + 56465178.

It is an arithmetic number, because the mean of its divisors is an integer number (23940609648).

Almost surely, 2^166793774231 is an apocalyptic number.

166793774231 is a deficient number, since it is larger than the sum of its proper divisors (24731102953).

166793774231 is a wasteful number, since it uses less digits than its factorization.

166793774231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112927621.

The product of its digits is 8001504, while the sum is 56.

The spelling of 166793774231 in words is "one hundred sixty-six billion, seven hundred ninety-three million, seven hundred seventy-four thousand, two hundred thirty-one".