444640462664066 has 4 divisors (see below), whose sum is σ = 666960693996102. Its totient is φ = 222320231332032.

The previous prime is 444640462664003. The next prime is 444640462664089. The reversal of 444640462664066 is 660466264046444.

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., 369756171612025 + 74884291052041 = 19229045^2 + 8653571^2 .

It is a super-2 number, since 2×444640462664066² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111160115666015 + ... + 111160115666018.

Almost surely, 2^{444640462664066} is an apocalyptic number.

444640462664066 is a deficient number, since it is larger than the sum of its proper divisors (222320231332036).

444640462664066 is a wasteful number, since it uses less digits than its factorization.

444640462664066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222320231332035.

The product of its (nonzero) digits is 382205952, while the sum is 62.

The spelling of 444640462664066 in words is "four hundred forty-four trillion, six hundred forty billion, four hundred sixty-two million, six hundred sixty-four thousand, sixty-six".