166315563 has 12 divisors (see below), whose sum is σ = 245345568. Its totient is φ = 108517680.

The previous prime is 166315519. The next prime is 166315571. The reversal of 166315563 is 365513661.

166315563 is a `hidden beast` number, since 1 + 66 + 31 + 5 + 563 = 666.

It is not a de Polignac number, because 166315563 - 2¹⁴ = 166299179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166315363) 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, 196168 + ... + 197013.

It is an arithmetic number, because the mean of its divisors is an integer number (20445464).

Almost surely, 2^166315563 is an apocalyptic number.

166315563 is a deficient number, since it is larger than the sum of its proper divisors (79030005).

166315563 is a wasteful number, since it uses less digits than its factorization.

166315563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393234 (or 393231 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 166315563 is about 12896.3391317071. The cubic root of 166315563 is about 549.9344968823.

The spelling of 166315563 in words is "one hundred sixty-six million, three hundred fifteen thousand, five hundred sixty-three".