166545885 has 16 divisors (see below), whose sum is σ = 290698560. Its totient is φ = 80749440.

The previous prime is 166545877. The next prime is 166545893. The reversal of 166545885 is 588545661.

It is an interprime number because it is at equal distance from previous prime (166545877) and next prime (166545893).

It is not a de Polignac number, because 166545885 - 2³ = 166545877 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 504520 + ... + 504849.

It is an arithmetic number, because the mean of its divisors is an integer number (18168660).

Almost surely, 2^166545885 is an apocalyptic number.

166545885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166545885 is a deficient number, since it is larger than the sum of its proper divisors (124152675).

166545885 is a wasteful number, since it uses less digits than its factorization.

166545885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009388.

The product of its digits is 1152000, while the sum is 48.

The square root of 166545885 is about 12905.2657857171. The cubic root of 166545885 is about 550.1882385979.

The spelling of 166545885 in words is "one hundred sixty-six million, five hundred forty-five thousand, eight hundred eighty-five".