672206644 has 12 divisors (see below), whose sum is σ = 1205053668. Its totient is φ = 327905600.

The previous prime is 672206627. The next prime is 672206653. The reversal of 672206644 is 446602276.

It can be written as a sum of positive squares in 2 ways, for example, as 14899600 + 657307044 = 3860^2 + 25638^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2049247 + ... + 2049574.

It is an arithmetic number, because the mean of its divisors is an integer number (100421139).

Almost surely, 2^672206644 is an apocalyptic number.

It is an amenable number.

672206644 is a deficient number, since it is larger than the sum of its proper divisors (532847024).

672206644 is a wasteful number, since it uses less digits than its factorization.

672206644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4098866 (or 4098864 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 37.

The square root of 672206644 is about 25926.9482199506. The cubic root of 672206644 is about 875.9936006566.

The spelling of 672206644 in words is "six hundred seventy-two million, two hundred six thousand, six hundred forty-four".