166985359 has 8 divisors (see below), whose sum is σ = 174476160. Its totient is φ = 159513816.

The previous prime is 166985353. The next prime is 166985363. The reversal of 166985359 is 953589661.

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 166985359 - 2⁹ = 166984847 is a prime.

It is a super-2 number, since 2×166985359² = 55768220240717762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166985353) 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, 14632 + ... + 23410.

It is an arithmetic number, because the mean of its divisors is an integer number (21809520).

Almost surely, 2^166985359 is an apocalyptic number.

166985359 is a deficient number, since it is larger than the sum of its proper divisors (7490801).

166985359 is an equidigital number, since it uses as much as digits as its factorization.

166985359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9629.

The product of its digits is 1749600, while the sum is 52.

The square root of 166985359 is about 12922.2814936063. The cubic root of 166985359 is about 550.6717511131.

The spelling of 166985359 in words is "one hundred sixty-six million, nine hundred eighty-five thousand, three hundred fifty-nine".