166940680 has 32 divisors (see below), whose sum is σ = 397713240. Its totient is φ = 62848000.

The previous prime is 166940621. The next prime is 166940689. The reversal of 166940680 is 86049661.

It can be written as a sum of positive squares in 4 ways, for example, as 107619876 + 59320804 = 10374^2 + 7702^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (166940689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122071 + ... + 123430.

Almost surely, 2^166940680 is an apocalyptic number.

166940680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166940680 is an abundant number, since it is smaller than the sum of its proper divisors (230772560).

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

166940680 is a wasteful number, since it uses less digits than its factorization.

166940680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245529 (or 245525 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 166940680 is about 12920.5526197605. The cubic root of 166940680 is about 550.6226337175.

The spelling of 166940680 in words is "one hundred sixty-six million, nine hundred forty thousand, six hundred eighty".