673199766461 has 2 divisors, whose sum is σ = 673199766462. Its totient is φ = 673199766460.

The previous prime is 673199766443. The next prime is 673199766487. The reversal of 673199766461 is 164667991376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 449074216900 + 224125549561 = 670130^2 + 473419^2 .

It is a cyclic number.

It is not a de Polignac number, because 673199766461 - 2¹⁸ = 673199504317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (673199766061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336599883230 + 336599883231.

It is an arithmetic number, because the mean of its divisors is an integer number (336599883231).

Almost surely, 2^673199766461 is an apocalyptic number.

It is an amenable number.

673199766461 is a deficient number, since it is larger than the sum of its proper divisors (1).

673199766461 is an equidigital number, since it uses as much as digits as its factorization.

673199766461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61725888, while the sum is 65.

The spelling of 673199766461 in words is "six hundred seventy-three billion, one hundred ninety-nine million, seven hundred sixty-six thousand, four hundred sixty-one".