673666737407 has 4 divisors (see below), whose sum is σ = 673698894360. Its totient is φ = 673634580456.

The previous prime is 673666737391. The next prime is 673666737439. The reversal of 673666737407 is 704737666376.

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 673666737407 - 2⁴ = 673666737391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 673666737407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673666707407) 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, 16047032 + ... + 16088957.

It is an arithmetic number, because the mean of its divisors is an integer number (168424723590).

Almost surely, 2^673666737407 is an apocalyptic number.

673666737407 is a deficient number, since it is larger than the sum of its proper divisors (32156953).

673666737407 is a wasteful number, since it uses less digits than its factorization.

673666737407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32156952.

The product of its (nonzero) digits is 112021056, while the sum is 62.

The spelling of 673666737407 in words is "six hundred seventy-three billion, six hundred sixty-six million, seven hundred thirty-seven thousand, four hundred seven".