666500339 has 2 divisors, whose sum is σ = 666500340. Its totient is φ = 666500338.

The previous prime is 666500257. The next prime is 666500357. The reversal of 666500339 is 933005666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666500339 - 2⁸ = 666500083 is a prime.

It is a super-2 number, since 2×666500339² = 888445403774229842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (666500369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333250169 + 333250170.

It is an arithmetic number, because the mean of its divisors is an integer number (333250170).

Almost surely, 2^666500339 is an apocalyptic number.

666500339 is a deficient number, since it is larger than the sum of its proper divisors (1).

666500339 is an equidigital number, since it uses as much as digits as its factorization.

666500339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 38.

The square root of 666500339 is about 25816.6678523779. The cubic root of 666500339 is about 873.5078083934.

The spelling of 666500339 in words is "six hundred sixty-six million, five hundred thousand, three hundred thirty-nine".