674073400661 has 2 divisors, whose sum is σ = 674073400662. Its totient is φ = 674073400660.

The previous prime is 674073400603. The next prime is 674073400669. The reversal of 674073400661 is 166004370476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 615118647025 + 58954753636 = 784295^2 + 242806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-674073400661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (674073400669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337036700330 + 337036700331.

It is an arithmetic number, because the mean of its divisors is an integer number (337036700331).

Almost surely, 2^674073400661 is an apocalyptic number.

It is an amenable number.

674073400661 is a deficient number, since it is larger than the sum of its proper divisors (1).

674073400661 is an equidigital number, since it uses as much as digits as its factorization.

674073400661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 44.

The spelling of 674073400661 in words is "six hundred seventy-four billion, seventy-three million, four hundred thousand, six hundred sixty-one".