672660126721 has 12 divisors (see below), whose sum is σ = 739413600016. Its totient is φ = 611473329720.

The previous prime is 672660126713. The next prime is 672660126757. The reversal of 672660126721 is 127621066276.

672660126721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 672660126721 - 2³ = 672660126713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672660126701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2029150 + ... + 2337256.

Almost surely, 2^672660126721 is an apocalyptic number.

It is an amenable number.

672660126721 is a deficient number, since it is larger than the sum of its proper divisors (66753473295).

672660126721 is a wasteful number, since it uses less digits than its factorization.

672660126721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326172 (or 326161 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 46.

The spelling of 672660126721 in words is "six hundred seventy-two billion, six hundred sixty million, one hundred twenty-six thousand, seven hundred twenty-one".