672666788 has 24 divisors (see below), whose sum is σ = 1200696000. Its totient is φ = 329645088.

The previous prime is 672666781. The next prime is 672666793. The reversal of 672666788 is 887666276.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (672666781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78281 + ... + 86447.

It is an arithmetic number, because the mean of its divisors is an integer number (50029000).

Almost surely, 2^672666788 is an apocalyptic number.

It is an amenable number.

672666788 is a deficient number, since it is larger than the sum of its proper divisors (528029212).

672666788 is a wasteful number, since it uses less digits than its factorization.

672666788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8579 (or 8577 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 56.

The square root of 672666788 is about 25935.8205576766. The cubic root of 672666788 is about 876.1934356647.

The spelling of 672666788 in words is "six hundred seventy-two million, six hundred sixty-six thousand, seven hundred eighty-eight".