6666379 has 2 divisors, whose sum is σ = 6666380. Its totient is φ = 6666378.

The previous prime is 6666353. The next prime is 6666383. The reversal of 6666379 is 9736666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6666379 - 2⁵ = 6666347 is a prime.

It is not a weakly prime, because it can be changed into another prime (6666479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333189 + 3333190.

It is an arithmetic number, because the mean of its divisors is an integer number (3333190).

Almost surely, 2^6666379 is an apocalyptic number.

6666379 is a deficient number, since it is larger than the sum of its proper divisors (1).

6666379 is an equidigital number, since it uses as much as digits as its factorization.

6666379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 43.

The square root of 6666379 is about 2581.9331904602. The cubic root of 6666379 is about 188.2044986903.

The spelling of 6666379 in words is "six million, six hundred sixty-six thousand, three hundred seventy-nine".