673656651 has 6 divisors (see below), whose sum is σ = 973059620. Its totient is φ = 449104428.

The previous prime is 673656649. The next prime is 673656667. The reversal of 673656651 is 156656376.

673656651 is a `hidden beast` number, since 6 + 7 + 36 + 566 + 51 = 666.

673656651 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 673656651 - 2¹ = 673656649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 673656597 and 673656606.

It is not an unprimeable number, because it can be changed into a prime (673656601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37425361 + ... + 37425378.

Almost surely, 2^673656651 is an apocalyptic number.

673656651 is a deficient number, since it is larger than the sum of its proper divisors (299402969).

673656651 is a wasteful number, since it uses less digits than its factorization.

673656651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74850745 (or 74850742 counting only the distinct ones).

The product of its digits is 680400, while the sum is 45.

The square root of 673656651 is about 25954.8964744612. The cubic root of 673656651 is about 876.6230125840.

The spelling of 673656651 in words is "six hundred seventy-three million, six hundred fifty-six thousand, six hundred fifty-one".