166564455 has 16 divisors (see below), whose sum is σ = 267771264. Its totient is φ = 88411680.

The previous prime is 166564421. The next prime is 166564471. The reversal of 166564455 is 554465661.

It is not a de Polignac number, because 166564455 - 2¹⁴ = 166548071 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23149 + ... + 29478.

It is an arithmetic number, because the mean of its divisors is an integer number (16735704).

Almost surely, 2^166564455 is an apocalyptic number.

166564455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166564455 is a deficient number, since it is larger than the sum of its proper divisors (101206809).

166564455 is a wasteful number, since it uses less digits than its factorization.

166564455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52846.

The product of its digits is 432000, while the sum is 42.

The square root of 166564455 is about 12905.9852394151. The cubic root of 166564455 is about 550.2086866482.

The spelling of 166564455 in words is "one hundred sixty-six million, five hundred sixty-four thousand, four hundred fifty-five".