166939040 has 24 divisors (see below), whose sum is σ = 394393860. Its totient is φ = 66775552.

The previous prime is 166939033. The next prime is 166939043. The reversal of 166939040 is 40939661.

166939040 is digitally balanced in base 3, 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 139523344 + 27415696 = 11812^2 + 5236^2 .

It is a super-2 number, since 2×166939040² = 55737286152243200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166938985 and 166939003.

It is not an unprimeable number, because it can be changed into a prime (166939043) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 521525 + ... + 521844.

Almost surely, 2^166939040 is an apocalyptic number.

166939040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166939040 is an abundant number, since it is smaller than the sum of its proper divisors (227454820).

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

166939040 is a wasteful number, since it uses less digits than its factorization.

166939040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043384 (or 1043376 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 166939040 is about 12920.4891548269. The cubic root of 166939040 is about 550.6208306337.

The spelling of 166939040 in words is "one hundred sixty-six million, nine hundred thirty-nine thousand, forty".