1444445666 has 8 divisors (see below), whose sum is σ = 2168353260. Its totient is φ = 721661248.

The previous prime is 1444445641. The next prime is 1444445677. The reversal of 1444445666 is 6665444441.

It can be written as a sum of positive squares in 2 ways, for example, as 1415339641 + 29106025 = 37621^2 + 5395^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277571 + ... + 282726.

Almost surely, 2^1444445666 is an apocalyptic number.

1444445666 is a deficient number, since it is larger than the sum of its proper divisors (723907594).

1444445666 is a wasteful number, since it uses less digits than its factorization.

1444445666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561588.

The product of its digits is 1105920, while the sum is 44.

The square root of 1444445666 is about 38005.8635739276. The cubic root of 1444445666 is about 1130.4041329959.

The spelling of 1444445666 in words is "one billion, four hundred forty-four million, four hundred forty-five thousand, six hundred sixty-six".