166461544 has 8 divisors (see below), whose sum is σ = 312115410. Its totient is φ = 83230768.

The previous prime is 166461521. The next prime is 166461553. The reversal of 166461544 is 445164661.

It can be written as a sum of positive squares in only one way, i.e., 164096100 + 2365444 = 12810^2 + 1538^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10403839 + ... + 10403854.

Almost surely, 2^166461544 is an apocalyptic number.

It is an amenable number.

166461544 is a deficient number, since it is larger than the sum of its proper divisors (145653866).

166461544 is a wasteful number, since it uses less digits than its factorization.

166461544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20807699 (or 20807695 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 166461544 is about 12901.9976747789. The cubic root of 166461544 is about 550.0953487585.

The spelling of 166461544 in words is "one hundred sixty-six million, four hundred sixty-one thousand, five hundred forty-four".