667462255517 has 2 divisors, whose sum is σ = 667462255518. Its totient is φ = 667462255516.

The previous prime is 667462255511. The next prime is 667462255549. The reversal of 667462255517 is 715552264766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 371793843001 + 295668412516 = 609749^2 + 543754^2 .

It is a cyclic number.

It is not a de Polignac number, because 667462255517 - 2¹⁰ = 667462254493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667462255511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333731127758 + 333731127759.

It is an arithmetic number, because the mean of its divisors is an integer number (333731127759).

Almost surely, 2^667462255517 is an apocalyptic number.

It is an amenable number.

667462255517 is a deficient number, since it is larger than the sum of its proper divisors (1).

667462255517 is an equidigital number, since it uses as much as digits as its factorization.

667462255517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168000, while the sum is 56.

The spelling of 667462255517 in words is "six hundred sixty-seven billion, four hundred sixty-two million, two hundred fifty-five thousand, five hundred seventeen".