662444644 has 27 divisors (see below), whose sum is σ = 1233111243. Its totient is φ = 311326848.

The previous prime is 662444609. The next prime is 662444681. The reversal of 662444644 is 446444266.

It is a happy number.

The square root of 662444644 is 25738.

It is a perfect power (a square), and thus also a powerful number.

662444644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 107371044 + 555073600 = 10362^2 + 23560^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 662444597 and 662444606.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 874714 + ... + 875470.

Almost surely, 2^662444644 is an apocalyptic number.

662444644 is the 25738-th square number.

It is an amenable number.

662444644 is a deficient number, since it is larger than the sum of its proper divisors (570666599).

662444644 is an equidigital number, since it uses as much as digits as its factorization.

662444644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552 (or 776 counting only the distinct ones).

The product of its digits is 442368, while the sum is 40.

The cubic root of 662444644 is about 871.7324197229.

The spelling of 662444644 in words is "six hundred sixty-two million, four hundred forty-four thousand, six hundred forty-four".