166461604 has 9 divisors (see below), whose sum is σ = 291352971. Its totient is φ = 83217900.

The previous prime is 166461593. The next prime is 166461629. The reversal of 166461604 is 406164661.

The square root of 166461604 is 12902.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166461604.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 22579 + ... + 29029.

Almost surely, 2^166461604 is an apocalyptic number.

166461604 is the 12902-nd square number.

It is an amenable number.

166461604 is a deficient number, since it is larger than the sum of its proper divisors (124891367).

166461604 is an frugal number, since it uses more digits than its factorization.

166461604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12906 (or 6453 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The cubic root of 166461604 is about 550.0954148513.

Multiplying 166461604 by its product of nonzero digits (20736), we get a square (3451747820544 = 1857888²).

The spelling of 166461604 in words is "one hundred sixty-six million, four hundred sixty-one thousand, six hundred four".