444721166 has 4 divisors (see below), whose sum is σ = 667081752. Its totient is φ = 222360582.

The previous prime is 444721157. The next prime is 444721181. The reversal of 444721166 is 661127444.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111180290 + ... + 111180293.

It is an arithmetic number, because the mean of its divisors is an integer number (166770438).

Almost surely, 2^444721166 is an apocalyptic number.

444721166 is a deficient number, since it is larger than the sum of its proper divisors (222360586).

444721166 is a wasteful number, since it uses less digits than its factorization.

444721166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222360585.

The product of its digits is 32256, while the sum is 35.

The square root of 444721166 is about 21088.4130744824. The cubic root of 444721166 is about 763.3011790621.

The spelling of 444721166 in words is "four hundred forty-four million, seven hundred twenty-one thousand, one hundred sixty-six".