166912420 has 12 divisors (see below), whose sum is σ = 350516124. Its totient is φ = 66764960.

The previous prime is 166912411. The next prime is 166912441. The reversal of 166912420 is 24219661.

166912420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 87310336 + 79602084 = 9344^2 + 8922^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4172791 + ... + 4172830.

It is an arithmetic number, because the mean of its divisors is an integer number (29209677).

Almost surely, 2^166912420 is an apocalyptic number.

166912420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166912420 is an abundant number, since it is smaller than the sum of its proper divisors (183603704).

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

166912420 is a wasteful number, since it uses less digits than its factorization.

166912420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8345630 (or 8345628 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 166912420 is about 12919.4589670001. The cubic root of 166912420 is about 550.5915618546.

The spelling of 166912420 in words is "one hundred sixty-six million, nine hundred twelve thousand, four hundred twenty".