166522545 has 48 divisors (see below), whose sum is σ = 340534272. Its totient is φ = 73664640.

The previous prime is 166522529. The next prime is 166522571. The reversal of 166522545 is 545225661.

166522545 is a `hidden beast` number, since 1 + 66 + 52 + 2 + 545 = 666.

It is not a de Polignac number, because 166522545 - 2⁴ = 166522529 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1239 + ... + 18291.

It is an arithmetic number, because the mean of its divisors is an integer number (7094464).

Almost surely, 2^166522545 is an apocalyptic number.

166522545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166522545 is an abundant number, since it is smaller than the sum of its proper divisors (174011727).

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

166522545 is a wasteful number, since it uses less digits than its factorization.

166522545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17102 (or 17099 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 166522545 is about 12904.3614719985. The cubic root of 166522545 is about 550.1625359847.

The spelling of 166522545 in words is "one hundred sixty-six million, five hundred twenty-two thousand, five hundred forty-five".