673050664421 has 4 divisors (see below), whose sum is σ = 673053383244. Its totient is φ = 673047945600.

The previous prime is 673050664393. The next prime is 673050664423. The reversal of 673050664421 is 124466050376.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 368887384321 + 304163280100 = 607361^2 + 551510^2 .

It is a cyclic number.

It is not a de Polignac number, because 673050664421 - 2⁶ = 673050664357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673050664423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 946220 + ... + 1497141.

It is an arithmetic number, because the mean of its divisors is an integer number (168263345811).

Almost surely, 2^673050664421 is an apocalyptic number.

It is an amenable number.

673050664421 is a deficient number, since it is larger than the sum of its proper divisors (2718823).

673050664421 is a wasteful number, since it uses less digits than its factorization.

673050664421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2718822.

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 673050664421 in words is "six hundred seventy-three billion, fifty million, six hundred sixty-four thousand, four hundred twenty-one".