6666593 has 2 divisors, whose sum is σ = 6666594. Its totient is φ = 6666592.

The previous prime is 6666589. The next prime is 6666599. The reversal of 6666593 is 3956666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5870929 + 795664 = 2423^2 + 892^2 .

It is a cyclic number.

It is not a de Polignac number, because 6666593 - 2² = 6666589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6666593.

It is not a weakly prime, because it can be changed into another prime (6666599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333296 + 3333297.

It is an arithmetic number, because the mean of its divisors is an integer number (3333297).

Almost surely, 2^6666593 is an apocalyptic number.

It is an amenable number.

6666593 is a deficient number, since it is larger than the sum of its proper divisors (1).

6666593 is an equidigital number, since it uses as much as digits as its factorization.

6666593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 41.

The square root of 6666593 is about 2581.9746319435. The cubic root of 6666593 is about 188.2065125438.

The spelling of 6666593 in words is "six million, six hundred sixty-six thousand, five hundred ninety-three".