666455459 has 2 divisors, whose sum is σ = 666455460. Its totient is φ = 666455458.

The previous prime is 666455399. The next prime is 666455497. The reversal of 666455459 is 954554666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666455459 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (666455059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333227729 + 333227730.

It is an arithmetic number, because the mean of its divisors is an integer number (333227730).

Almost surely, 2^666455459 is an apocalyptic number.

666455459 is a deficient number, since it is larger than the sum of its proper divisors (1).

666455459 is an equidigital number, since it uses as much as digits as its factorization.

666455459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888000, while the sum is 50.

The square root of 666455459 is about 25815.7986318456. The cubic root of 666455459 is about 873.4882015465.

The spelling of 666455459 in words is "six hundred sixty-six million, four hundred fifty-five thousand, four hundred fifty-nine".