166953920 has 112 divisors (see below), whose sum is σ = 461028288. Its totient is φ = 56401920.

The previous prime is 166953877. The next prime is 166953937. The reversal of 166953920 is 29359661.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×166953920² = 55747222806732800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 163010 + ... + 164030.

It is an arithmetic number, because the mean of its divisors is an integer number (4116324).

Almost surely, 2^166953920 is an apocalyptic number.

166953920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166953920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230514144).

166953920 is an abundant number, since it is smaller than the sum of its proper divisors (294074368).

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

166953920 is a wasteful number, since it uses less digits than its factorization.

166953920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118 (or 1108 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 166953920 is about 12921.0649715881. The cubic root of 166953920 is about 550.6371898878.

The spelling of 166953920 in words is "one hundred sixty-six million, nine hundred fifty-three thousand, nine hundred twenty".