666074719 has 2 divisors, whose sum is σ = 666074720. Its totient is φ = 666074718.

The previous prime is 666074611. The next prime is 666074723. The reversal of 666074719 is 917470666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666074719 - 2¹⁵ = 666041951 is a prime.

It is a super-2 number, since 2×666074719² = 887311062581857922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666074729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333037359 + 333037360.

It is an arithmetic number, because the mean of its divisors is an integer number (333037360).

Almost surely, 2^666074719 is an apocalyptic number.

666074719 is a deficient number, since it is larger than the sum of its proper divisors (1).

666074719 is an equidigital number, since it uses as much as digits as its factorization.

666074719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 666074719 is about 25808.4234117468. The cubic root of 666074719 is about 873.3218312136.

The spelling of 666074719 in words is "six hundred sixty-six million, seventy-four thousand, seven hundred nineteen".