166163445 has 48 divisors (see below), whose sum is σ = 332916480. Its totient is φ = 75094272.

The previous prime is 166163429. The next prime is 166163453. The reversal of 166163445 is 544361661.

It is a happy number.

166163445 is a `hidden beast` number, since 1 + 6 + 616 + 34 + 4 + 5 = 666.

It is not a de Polignac number, because 166163445 - 2⁴ = 166163429 is a prime.

It is a super-2 number, since 2×166163445² = 55220580908536050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25072 + ... + 30998.

It is an arithmetic number, because the mean of its divisors is an integer number (6935760).

Almost surely, 2^166163445 is an apocalyptic number.

166163445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166163445 is an abundant number, since it is smaller than the sum of its proper divisors (166753035).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166163445 is a wasteful number, since it uses less digits than its factorization.

166163445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6034 (or 6031 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 166163445 is about 12890.4400623097. The cubic root of 166163445 is about 549.7667826652.

The spelling of 166163445 in words is "one hundred sixty-six million, one hundred sixty-three thousand, four hundred forty-five".