444086666 has 4 divisors (see below), whose sum is σ = 666130002. Its totient is φ = 222043332.

The previous prime is 444086627. The next prime is 444086689. The reversal of 444086666 is 666680444.

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

It can be written as a sum of positive squares in only one way, i.e., 442471225 + 1615441 = 21035^2 + 1271^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111021665 + ... + 111021668.

Almost surely, 2^444086666 is an apocalyptic number.

444086666 is a deficient number, since it is larger than the sum of its proper divisors (222043336).

444086666 is a wasteful number, since it uses less digits than its factorization.

444086666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222043335.

The product of its (nonzero) digits is 663552, while the sum is 44.

The square root of 444086666 is about 21073.3638985331. The cubic root of 444086666 is about 762.9379963552.

The spelling of 444086666 in words is "four hundred forty-four million, eighty-six thousand, six hundred sixty-six".