166361644 has 24 divisors (see below), whose sum is σ = 308251440. Its totient is φ = 78341184.

The previous prime is 166361639. The next prime is 166361687. The reversal of 166361644 is 446163661.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6822 + ... + 19474.

It is an arithmetic number, because the mean of its divisors is an integer number (12843810).

Almost surely, 2^166361644 is an apocalyptic number.

It is an amenable number.

166361644 is a deficient number, since it is larger than the sum of its proper divisors (141889796).

166361644 is a wasteful number, since it uses less digits than its factorization.

166361644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12849 (or 12847 counting only the distinct ones).

The product of its digits is 62208, while the sum is 37.

The square root of 166361644 is about 12898.1256002568. The cubic root of 166361644 is about 549.9852822508.

The spelling of 166361644 in words is "one hundred sixty-six million, three hundred sixty-one thousand, six hundred forty-four".