166985895 has 8 divisors (see below), whose sum is σ = 267177456. Its totient is φ = 89059136.

The previous prime is 166985893. The next prime is 166985941. The reversal of 166985895 is 598589661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166985895 - 2¹ = 166985893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166985893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5566182 + ... + 5566211.

It is an arithmetic number, because the mean of its divisors is an integer number (33397182).

Almost surely, 2^166985895 is an apocalyptic number.

166985895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166985895 is a deficient number, since it is larger than the sum of its proper divisors (100191561).

166985895 is a wasteful number, since it uses less digits than its factorization.

166985895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11132401.

The product of its digits is 4665600, while the sum is 57.

The square root of 166985895 is about 12922.3022329614. The cubic root of 166985895 is about 550.6723403059.

The spelling of 166985895 in words is "one hundred sixty-six million, nine hundred eighty-five thousand, eight hundred ninety-five".