80664379 has 2 divisors, whose sum is σ = 80664380. Its totient is φ = 80664378.

The previous prime is 80664377. The next prime is 80664391. The reversal of 80664379 is 97346608.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80664379 - 2¹ = 80664377 is a prime.

Together with 80664377, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (80664377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40332189 + 40332190.

It is an arithmetic number, because the mean of its divisors is an integer number (40332190).

Almost surely, 2^80664379 is an apocalyptic number.

80664379 is a deficient number, since it is larger than the sum of its proper divisors (1).

80664379 is an equidigital number, since it uses as much as digits as its factorization.

80664379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 80664379 is about 8981.3350343922. The cubic root of 80664379 is about 432.0764521614.

The spelling of 80664379 in words is "eighty million, six hundred sixty-four thousand, three hundred seventy-nine".