667512335704657 has 2 divisors, whose sum is σ = 667512335704658. Its totient is φ = 667512335704656.

The previous prime is 667512335704619. The next prime is 667512335704667. The reversal of 667512335704657 is 756407533215766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416656439162896 + 250855896541761 = 20412164^2 + 15838431^2 .

It is a cyclic number.

It is not a de Polignac number, because 667512335704657 - 2⁴⁷ = 526774847349329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 667512335704592 and 667512335704601.

It is not a weakly prime, because it can be changed into another prime (667512335704667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333756167852328 + 333756167852329.

It is an arithmetic number, because the mean of its divisors is an integer number (333756167852329).

Almost surely, 2^{667512335704657} is an apocalyptic number.

It is an amenable number.

667512335704657 is a deficient number, since it is larger than the sum of its proper divisors (1).

667512335704657 is an equidigital number, since it uses as much as digits as its factorization.

667512335704657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 666792000, while the sum is 67.

The spelling of 667512335704657 in words is "six hundred sixty-seven trillion, five hundred twelve billion, three hundred thirty-five million, seven hundred four thousand, six hundred fifty-seven".