6665166793 has 2 divisors, whose sum is σ = 6665166794. Its totient is φ = 6665166792.

The previous prime is 6665166737. The next prime is 6665166817. The reversal of 6665166793 is 3976615666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3428922249 + 3236244544 = 58557^2 + 56888^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6665166793 is a prime.

It is not a weakly prime, because it can be changed into another prime (6665166713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332583396 + 3332583397.

It is an arithmetic number, because the mean of its divisors is an integer number (3332583397).

Almost surely, 2^6665166793 is an apocalyptic number.

It is an amenable number.

6665166793 is a deficient number, since it is larger than the sum of its proper divisors (1).

6665166793 is an equidigital number, since it uses as much as digits as its factorization.

6665166793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7348320, while the sum is 55.

The square root of 6665166793 is about 81640.4727632073. The cubic root of 6665166793 is about 1881.9309036600.

The spelling of 6665166793 in words is "six billion, six hundred sixty-five million, one hundred sixty-six thousand, seven hundred ninety-three".