666466365619 has 2 divisors, whose sum is σ = 666466365620. Its totient is φ = 666466365618.

The previous prime is 666466365601. The next prime is 666466365689. The reversal of 666466365619 is 916563664666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 666466365619 - 2⁷ = 666466365491 is a prime.

It is a super-2 number, since 2×666466365619² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (666466365689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333233182809 + 333233182810.

It is an arithmetic number, because the mean of its divisors is an integer number (333233182810).

Almost surely, 2^666466365619 is an apocalyptic number.

666466365619 is a deficient number, since it is larger than the sum of its proper divisors (1).

666466365619 is an equidigital number, since it uses as much as digits as its factorization.

666466365619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151165440, while the sum is 64.

The spelling of 666466365619 in words is "six hundred sixty-six billion, four hundred sixty-six million, three hundred sixty-five thousand, six hundred nineteen".