166943840 has 48 divisors (see below), whose sum is σ = 450751392. Its totient is φ = 57237504.

The previous prime is 166943831. The next prime is 166943849. The reversal of 166943840 is 48349661.

166943840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (166943831) and next prime (166943849).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166943849) 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, 73409 + ... + 75648.

It is an arithmetic number, because the mean of its divisors is an integer number (9390654).

Almost surely, 2^166943840 is an apocalyptic number.

166943840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166943840 is an abundant number, since it is smaller than the sum of its proper divisors (283807552).

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

166943840 is a wasteful number, since it uses less digits than its factorization.

166943840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149079 (or 149071 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 166943840 is about 12920.6749049730. The cubic root of 166943840 is about 550.6261079187.

The spelling of 166943840 in words is "one hundred sixty-six million, nine hundred forty-three thousand, eight hundred forty".