674663745641 has 2 divisors, whose sum is σ = 674663745642. Its totient is φ = 674663745640.

The previous prime is 674663745593. The next prime is 674663745643. The reversal of 674663745641 is 146547366476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 343372560400 + 331291185241 = 585980^2 + 575579^2 .

It is a cyclic number.

It is not a de Polignac number, because 674663745641 - 2¹⁰ = 674663744617 is a prime.

Together with 674663745643, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (674663745643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337331872820 + 337331872821.

It is an arithmetic number, because the mean of its divisors is an integer number (337331872821).

Almost surely, 2^674663745641 is an apocalyptic number.

It is an amenable number.

674663745641 is a deficient number, since it is larger than the sum of its proper divisors (1).

674663745641 is an equidigital number, since it uses as much as digits as its factorization.

674663745641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60963840, while the sum is 59.

The spelling of 674663745641 in words is "six hundred seventy-four billion, six hundred sixty-three million, seven hundred forty-five thousand, six hundred forty-one".