166980885 has 16 divisors (see below), whose sum is σ = 282885696. Its totient is φ = 83817728.

The previous prime is 166980881. The next prime is 166980887. The reversal of 166980885 is 588089661.

It is a cyclic number.

It is not a de Polignac number, because 166980885 - 2² = 166980881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166980881) by changing a digit.

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, 327159 + ... + 327668.

It is an arithmetic number, because the mean of its divisors is an integer number (17680356).

Almost surely, 2^166980885 is an apocalyptic number.

166980885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166980885 is a deficient number, since it is larger than the sum of its proper divisors (115904811).

166980885 is a wasteful number, since it uses less digits than its factorization.

166980885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654852.

The product of its (nonzero) digits is 829440, while the sum is 51.

The square root of 166980885 is about 12922.1083806011. The cubic root of 166980885 is about 550.6668330623. Note that the first 3 decimals are identical.

The spelling of 166980885 in words is "one hundred sixty-six million, nine hundred eighty thousand, eight hundred eighty-five".