166779475 has 12 divisors (see below), whose sum is σ = 206967904. Its totient is φ = 133319520.

The previous prime is 166779451. The next prime is 166779479. The reversal of 166779475 is 574977661.

It is not a de Polignac number, because 166779475 - 2¹⁷ = 166648403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166779479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55717 + ... + 58633.

Almost surely, 2^166779475 is an apocalyptic number.

166779475 is a deficient number, since it is larger than the sum of its proper divisors (40188429).

166779475 is a wasteful number, since it uses less digits than its factorization.

166779475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5214 (or 5209 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 52.

The square root of 166779475 is about 12914.3127962738. The cubic root of 166779475 is about 550.4453417833.

The spelling of 166779475 in words is "one hundred sixty-six million, seven hundred seventy-nine thousand, four hundred seventy-five".