66312339 has 4 divisors (see below), whose sum is σ = 88416456. Its totient is φ = 44208224.

The previous prime is 66312329. The next prime is 66312341. The reversal of 66312339 is 93321366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66312339 - 2¹² = 66308243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66312329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11052054 + ... + 11052059.

It is an arithmetic number, because the mean of its divisors is an integer number (22104114).

Almost surely, 2^66312339 is an apocalyptic number.

66312339 is a deficient number, since it is larger than the sum of its proper divisors (22104117).

66312339 is a wasteful number, since it uses less digits than its factorization.

66312339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22104116.

The product of its digits is 17496, while the sum is 33.

The square root of 66312339 is about 8143.2388519557. The cubic root of 66312339 is about 404.7604924384.

The spelling of 66312339 in words is "sixty-six million, three hundred twelve thousand, three hundred thirty-nine".