166561484 has 12 divisors (see below), whose sum is σ = 296423400. Its totient is φ = 81869088.

The previous prime is 166561463. The next prime is 166561511. The reversal of 166561484 is 484165661.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352649 + ... + 353120.

It is an arithmetic number, because the mean of its divisors is an integer number (24701950).

Almost surely, 2^166561484 is an apocalyptic number.

It is an amenable number.

166561484 is a deficient number, since it is larger than the sum of its proper divisors (129861916).

166561484 is a wasteful number, since it uses less digits than its factorization.

166561484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705832 (or 705830 counting only the distinct ones).

The product of its digits is 138240, while the sum is 41.

The square root of 166561484 is about 12905.8701372670. The cubic root of 166561484 is about 550.2054152825.

The spelling of 166561484 in words is "one hundred sixty-six million, five hundred sixty-one thousand, four hundred eighty-four".