166234820 has 24 divisors (see below), whose sum is σ = 350161728. Its totient is φ = 66290400.

The previous prime is 166234799. The next prime is 166234829. The reversal of 166234820 is 28432661.

It is not an unprimeable number, because it can be changed into a prime (166234829) 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, 5936 + ... + 19175.

It is an arithmetic number, because the mean of its divisors is an integer number (14590072).

Almost surely, 2^166234820 is an apocalyptic number.

166234820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166234820 is an abundant number, since it is smaller than the sum of its proper divisors (183926908).

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

166234820 is a wasteful number, since it uses less digits than its factorization.

166234820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25451 (or 25449 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 166234820 is about 12893.2082896384. The cubic root of 166234820 is about 549.8454882775.

The spelling of 166234820 in words is "one hundred sixty-six million, two hundred thirty-four thousand, eight hundred twenty".