673997665351 has 4 divisors (see below), whose sum is σ = 674203721104. Its totient is φ = 673791609600.

The previous prime is 673997665277. The next prime is 673997665387. The reversal of 673997665351 is 153566799376.

673997665351 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 673997665351 - 2²¹ = 673995568199 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 (673997635351) 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, 103022970 + ... + 103029511.

It is an arithmetic number, because the mean of its divisors is an integer number (168550930276).

Almost surely, 2^673997665351 is an apocalyptic number.

673997665351 is a deficient number, since it is larger than the sum of its proper divisors (206055753).

673997665351 is a wasteful number, since it uses less digits than its factorization.

673997665351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206055752.

The product of its digits is 192893400, while the sum is 67.

The spelling of 673997665351 in words is "six hundred seventy-three billion, nine hundred ninety-seven million, six hundred sixty-five thousand, three hundred fifty-one".