674874617621 has 2 divisors, whose sum is σ = 674874617622. Its totient is φ = 674874617620.

The previous prime is 674874617611. The next prime is 674874617707. The reversal of 674874617621 is 126716478476.

674874617621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 518781670225 + 156092947396 = 720265^2 + 395086^2 .

It is a cyclic number.

It is not a de Polignac number, because 674874617621 - 2³⁸ = 399996710677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (674874617611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337437308810 + 337437308811.

It is an arithmetic number, because the mean of its divisors is an integer number (337437308811).

Almost surely, 2^674874617621 is an apocalyptic number.

It is an amenable number.

674874617621 is a deficient number, since it is larger than the sum of its proper divisors (1).

674874617621 is an equidigital number, since it uses as much as digits as its factorization.

674874617621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18966528, while the sum is 59.

The spelling of 674874617621 in words is "six hundred seventy-four billion, eight hundred seventy-four million, six hundred seventeen thousand, six hundred twenty-one".