166680544 has 24 divisors (see below), whose sum is σ = 328602960. Its totient is φ = 83225856.

The previous prime is 166680541. The next prime is 166680551. The reversal of 166680544 is 445086661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 166680497 and 166680506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166680541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23172 + ... + 29500.

It is an arithmetic number, because the mean of its divisors is an integer number (13691790).

Almost surely, 2^166680544 is an apocalyptic number.

It is an amenable number.

166680544 is a deficient number, since it is larger than the sum of its proper divisors (161922416).

166680544 is an equidigital number, since it uses as much as digits as its factorization.

166680544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7162 (or 7154 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 166680544 is about 12910.4819429795. The cubic root of 166680544 is about 550.3364817069.

The spelling of 166680544 in words is "one hundred sixty-six million, six hundred eighty thousand, five hundred forty-four".