673316181 has 6 divisors (see below), whose sum is σ = 972567830. Its totient is φ = 448877448.

The previous prime is 673316179. The next prime is 673316207. The reversal of 673316181 is 181613376.

673316181 is a `hidden beast` number, since 6 + 7 + 3 + 31 + 618 + 1 = 666.

673316181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 635493681 + 37822500 = 25209^2 + 6150^2 .

It is not a de Polignac number, because 673316181 - 2¹ = 673316179 is a prime.

It is a super-2 number, since 2×673316181² = 906709359192849522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673316141) 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, 37406446 + ... + 37406463.

Almost surely, 2^673316181 is an apocalyptic number.

It is an amenable number.

673316181 is a deficient number, since it is larger than the sum of its proper divisors (299251649).

673316181 is a wasteful number, since it uses less digits than its factorization.

673316181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74812915 (or 74812912 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 673316181 is about 25948.3367675079. The cubic root of 673316181 is about 876.4753042360.

The spelling of 673316181 in words is "six hundred seventy-three million, three hundred sixteen thousand, one hundred eighty-one".