672926661 has 48 divisors (see below), whose sum is σ = 1083264000. Its totient is φ = 399129120.

The previous prime is 672926633. The next prime is 672926669. The reversal of 672926661 is 166629276.

It is not a de Polignac number, because 672926661 - 2⁷ = 672926533 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672926669) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1086810 + ... + 1087428.

It is an arithmetic number, because the mean of its divisors is an integer number (22568000).

Almost surely, 2^672926661 is an apocalyptic number.

It is an amenable number.

672926661 is a deficient number, since it is larger than the sum of its proper divisors (410337339).

672926661 is a wasteful number, since it uses less digits than its factorization.

672926661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854 (or 851 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 672926661 is about 25940.8299982865. The cubic root of 672926661 is about 876.3062551193.

The spelling of 672926661 in words is "six hundred seventy-two million, nine hundred twenty-six thousand, six hundred sixty-one".