673907661 has 32 divisors (see below), whose sum is σ = 1142292480. Its totient is φ = 384656688.

The previous prime is 673907657. The next prime is 673907669. The reversal of 673907661 is 166709376.

It is not a de Polignac number, because 673907661 - 2² = 673907657 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 (673907669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 249460 + ... + 252146.

It is an arithmetic number, because the mean of its divisors is an integer number (35696640).

Almost surely, 2^673907661 is an apocalyptic number.

It is an amenable number.

673907661 is a deficient number, since it is larger than the sum of its proper divisors (468384819).

673907661 is a wasteful number, since it uses less digits than its factorization.

673907661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030 (or 4024 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 673907661 is about 25959.7315278876. The cubic root of 673907661 is about 876.7318780414.

The spelling of 673907661 in words is "six hundred seventy-three million, nine hundred seven thousand, six hundred sixty-one".