6668329771 has 2 divisors, whose sum is σ = 6668329772. Its totient is φ = 6668329770.

The previous prime is 6668329739. The next prime is 6668329799. The reversal of 6668329771 is 1779238666.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6668329771 - 2⁵ = 6668329739 is a prime.

It is not a weakly prime, because it can be changed into another prime (6668329721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3334164885 + 3334164886.

It is an arithmetic number, because the mean of its divisors is an integer number (3334164886).

Almost surely, 2^6668329771 is an apocalyptic number.

6668329771 is a deficient number, since it is larger than the sum of its proper divisors (1).

6668329771 is an equidigital number, since it uses as much as digits as its factorization.

6668329771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 55.

The square root of 6668329771 is about 81659.8418502020. The cubic root of 6668329771 is about 1882.2285488595.

The spelling of 6668329771 in words is "six billion, six hundred sixty-eight million, three hundred twenty-nine thousand, seven hundred seventy-one".