672666328 has 8 divisors (see below), whose sum is σ = 1261249380. Its totient is φ = 336333160.

The previous prime is 672666317. The next prime is 672666331. The reversal of 672666328 is 823666276.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42041638 + ... + 42041653.

Almost surely, 2^672666328 is an apocalyptic number.

It is an amenable number.

672666328 is a deficient number, since it is larger than the sum of its proper divisors (588583052).

672666328 is a wasteful number, since it uses less digits than its factorization.

672666328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84083297 (or 84083293 counting only the distinct ones).

The product of its digits is 870912, while the sum is 46.

The square root of 672666328 is about 25935.8116896310. The cubic root of 672666328 is about 876.1932359378.

The spelling of 672666328 in words is "six hundred seventy-two million, six hundred sixty-six thousand, three hundred twenty-eight".