672060644 has 18 divisors (see below), whose sum is σ = 1229468310. Its totient is φ = 321419296.

The previous prime is 672060601. The next prime is 672060659. The reversal of 672060644 is 446060276.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 338560000 + 333500644 = 18400^2 + 18262^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 156689 + ... + 160920.

It is an arithmetic number, because the mean of its divisors is an integer number (68303795).

Almost surely, 2^672060644 is an apocalyptic number.

It is an amenable number.

672060644 is a deficient number, since it is larger than the sum of its proper divisors (557407666).

672060644 is a wasteful number, since it uses less digits than its factorization.

672060644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317659 (or 317634 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 672060644 is about 25924.1324637875. The cubic root of 672060644 is about 875.9301755539.

The spelling of 672060644 in words is "six hundred seventy-two million, sixty thousand, six hundred forty-four".