66239323 has 2 divisors, whose sum is σ = 66239324. Its totient is φ = 66239322.

The previous prime is 66239317. The next prime is 66239387. The reversal of 66239323 is 32393266.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66239323 is a prime.

It is a super-2 number, since 2×66239323² = 8775295822996658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66239423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33119661 + 33119662.

It is an arithmetic number, because the mean of its divisors is an integer number (33119662).

Almost surely, 2^66239323 is an apocalyptic number.

66239323 is a deficient number, since it is larger than the sum of its proper divisors (1).

66239323 is an equidigital number, since it uses as much as digits as its factorization.

66239323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 34.

The square root of 66239323 is about 8138.7543887256. The cubic root of 66239323 is about 404.6118783372.

The spelling of 66239323 in words is "sixty-six million, two hundred thirty-nine thousand, three hundred twenty-three".