667376531266573 has 2 divisors, whose sum is σ = 667376531266574. Its totient is φ = 667376531266572.

The previous prime is 667376531266553. The next prime is 667376531266663. The reversal of 667376531266573 is 375662135673766.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 500871651146244 + 166504880120329 = 22380162^2 + 12903677^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667376531266573 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 667376531266496 and 667376531266505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667376531266553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333688265633286 + 333688265633287.

It is an arithmetic number, because the mean of its divisors is an integer number (333688265633287).

Almost surely, 2^{667376531266573} is an apocalyptic number.

It is an amenable number.

667376531266573 is a deficient number, since it is larger than the sum of its proper divisors (1).

667376531266573 is an equidigital number, since it uses as much as digits as its factorization.

667376531266573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600676800, while the sum is 73.

The spelling of 667376531266573 in words is "six hundred sixty-seven trillion, three hundred seventy-six billion, five hundred thirty-one million, two hundred sixty-six thousand, five hundred seventy-three".