667400046033517 has 2 divisors, whose sum is σ = 667400046033518. Its totient is φ = 667400046033516.

The previous prime is 667400046033509. The next prime is 667400046033521. The reversal of 667400046033517 is 715330640004766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 594892538995561 + 72507507037956 = 24390419^2 + 8515134^2 .

It is a cyclic number.

It is not a de Polignac number, because 667400046033517 - 2³ = 667400046033509 is a prime.

It is a super-2 number, since 2×667400046033517² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667400046033547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333700023016758 + 333700023016759.

It is an arithmetic number, because the mean of its divisors is an integer number (333700023016759).

Almost surely, 2^{667400046033517} is an apocalyptic number.

It is an amenable number.

667400046033517 is a deficient number, since it is larger than the sum of its proper divisors (1).

667400046033517 is an equidigital number, since it uses as much as digits as its factorization.

667400046033517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7620480, while the sum is 52.

The spelling of 667400046033517 in words is "six hundred sixty-seven trillion, four hundred billion, forty-six million, thirty-three thousand, five hundred seventeen".