66863339 has 2 divisors, whose sum is σ = 66863340. Its totient is φ = 66863338.

The previous prime is 66863267. The next prime is 66863347. The reversal of 66863339 is 93336866.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66863339 is a prime.

It is a super-2 number, since 2×66863339² = 8941412204457842, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66863339.

It is not a weakly prime, because it can be changed into another prime (66863359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33431669 + 33431670.

It is an arithmetic number, because the mean of its divisors is an integer number (33431670).

Almost surely, 2^66863339 is an apocalyptic number.

66863339 is a deficient number, since it is larger than the sum of its proper divisors (1).

66863339 is an equidigital number, since it uses as much as digits as its factorization.

66863339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 44.

The square root of 66863339 is about 8177.0006114712. Note that the first 3 decimals coincide. The cubic root of 66863339 is about 405.8784751997.

The spelling of 66863339 in words is "sixty-six million, eight hundred sixty-three thousand, three hundred thirty-nine".