4566665993 has 2 divisors, whose sum is σ = 4566665994. Its totient is φ = 4566665992.

The previous prime is 4566665981. The next prime is 4566666023. The reversal of 4566665993 is 3995666654.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4391447824 + 175218169 = 66268^2 + 13237^2 .

It is a cyclic number.

It is not a de Polignac number, because 4566665993 - 2⁸ = 4566665737 is a prime.

It is not a weakly prime, because it can be changed into another prime (4566665933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2283332996 + 2283332997.

It is an arithmetic number, because the mean of its divisors is an integer number (2283332997).

Almost surely, 2^4566665993 is an apocalyptic number.

It is an amenable number.

4566665993 is a deficient number, since it is larger than the sum of its proper divisors (1).

4566665993 is an equidigital number, since it uses as much as digits as its factorization.

4566665993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31492800, while the sum is 59.

The square root of 4566665993 is about 67577.1114579485. Note that the first 3 decimals coincide. The cubic root of 4566665993 is about 1659.0765165161.

The spelling of 4566665993 in words is "four billion, five hundred sixty-six million, six hundred sixty-five thousand, nine hundred ninety-three".