166109964 has 12 divisors (see below), whose sum is σ = 387589944. Its totient is φ = 55369984.

The previous prime is 166109947. The next prime is 166109969. The reversal of 166109964 is 469901661.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (166109969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6921237 + ... + 6921260.

It is an arithmetic number, because the mean of its divisors is an integer number (32299162).

Almost surely, 2^166109964 is an apocalyptic number.

It is an amenable number.

166109964 is an abundant number, since it is smaller than the sum of its proper divisors (221479980).

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

166109964 is a wasteful number, since it uses less digits than its factorization.

166109964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13842504 (or 13842502 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 166109964 is about 12888.3654510570. The cubic root of 166109964 is about 549.7077940946.

The spelling of 166109964 in words is "one hundred sixty-six million, one hundred nine thousand, nine hundred sixty-four".