166983940 has 12 divisors (see below), whose sum is σ = 350666316. Its totient is φ = 66793568.

The previous prime is 166983937. The next prime is 166983941. The reversal of 166983940 is 49389661.

It can be written as a sum of positive squares in 2 ways, for example, as 53816896 + 113167044 = 7336^2 + 10638^2 .

It is not an unprimeable number, because it can be changed into a prime (166983941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4174579 + ... + 4174618.

It is an arithmetic number, because the mean of its divisors is an integer number (29222193).

Almost surely, 2^166983940 is an apocalyptic number.

166983940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166983940 is an abundant number, since it is smaller than the sum of its proper divisors (183682376).

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

166983940 is a wasteful number, since it uses less digits than its factorization.

166983940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8349206 (or 8349204 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 166983940 is about 12922.2265883245. The cubic root of 166983940 is about 550.6701912848.

The spelling of 166983940 in words is "one hundred sixty-six million, nine hundred eighty-three thousand, nine hundred forty".