166913220 has 24 divisors (see below), whose sum is σ = 467357184. Its totient is φ = 44510176.

The previous prime is 166913171. The next prime is 166913237. The reversal of 166913220 is 22319661.

166913220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1390884 + ... + 1391003.

It is an arithmetic number, because the mean of its divisors is an integer number (19473216).

Almost surely, 2^166913220 is an apocalyptic number.

166913220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166913220 is an abundant number, since it is smaller than the sum of its proper divisors (300443964).

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

166913220 is a wasteful number, since it uses less digits than its factorization.

166913220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2781899 (or 2781897 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 166913220 is about 12919.4899280119. The cubic root of 166913220 is about 550.5924415026.

The spelling of 166913220 in words is "one hundred sixty-six million, nine hundred thirteen thousand, two hundred twenty".