166500980 has 24 divisors (see below), whose sum is σ = 352751112. Its totient is φ = 66010112.

The previous prime is 166500973. The next prime is 166500989. The reversal of 166500980 is 89005661.

It can be written as a sum of positive squares in 4 ways, for example, as 8596624 + 157904356 = 2932^2 + 12566^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 166500980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166500989) 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, 34577 + ... + 39096.

It is an arithmetic number, because the mean of its divisors is an integer number (14697963).

Almost surely, 2^166500980 is an apocalyptic number.

166500980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166500980 is an abundant number, since it is smaller than the sum of its proper divisors (186250132).

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

166500980 is a wasteful number, since it uses less digits than its factorization.

166500980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73795 (or 73793 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 166500980 is about 12903.5258747367. The cubic root of 166500980 is about 550.1387859127.

The spelling of 166500980 in words is "one hundred sixty-six million, five hundred thousand, nine hundred eighty".