6662399 has 2 divisors, whose sum is σ = 6662400. Its totient is φ = 6662398.

The previous prime is 6662393. The next prime is 6662401. The reversal of 6662399 is 9932666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6662399 is a prime.

Together with 6662401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6662393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3331199 + 3331200.

It is an arithmetic number, because the mean of its divisors is an integer number (3331200).

Almost surely, 2^6662399 is an apocalyptic number.

6662399 is a deficient number, since it is larger than the sum of its proper divisors (1).

6662399 is an equidigital number, since it uses as much as digits as its factorization.

6662399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 41.

The square root of 6662399 is about 2581.1623350731. The cubic root of 6662399 is about 188.1670369227.

The spelling of 6662399 in words is "six million, six hundred sixty-two thousand, three hundred ninety-nine".