166979140 has 24 divisors (see below), whose sum is σ = 355098240. Its totient is φ = 65945568.

The previous prime is 166979123. The next prime is 166979147. The reversal of 166979140 is 41979661.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (166979147) 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, 51262 + ... + 54421.

It is an arithmetic number, because the mean of its divisors is an integer number (14795760).

Almost surely, 2^166979140 is an apocalyptic number.

166979140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166979140 is an abundant number, since it is smaller than the sum of its proper divisors (188119100).

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

166979140 is a wasteful number, since it uses less digits than its factorization.

166979140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105771 (or 105769 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 166979140 is about 12922.0408604833. The cubic root of 166979140 is about 550.6649148448.

The spelling of 166979140 in words is "one hundred sixty-six million, nine hundred seventy-nine thousand, one hundred forty".