66079231 has 2 divisors, whose sum is σ = 66079232. Its totient is φ = 66079230.

The previous prime is 66079229. The next prime is 66079291. The reversal of 66079231 is 13297066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66079231 - 2¹ = 66079229 is a prime.

It is a super-2 number, since 2×66079231² = 8732929539102722, which contains 22 as substring.

Together with 66079229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66079201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33039615 + 33039616.

It is an arithmetic number, because the mean of its divisors is an integer number (33039616).

Almost surely, 2^66079231 is an apocalyptic number.

66079231 is a deficient number, since it is larger than the sum of its proper divisors (1).

66079231 is an equidigital number, since it uses as much as digits as its factorization.

66079231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 66079231 is about 8128.9132730027. The cubic root of 66079231 is about 404.2856502676.

The spelling of 66079231 in words is "sixty-six million, seventy-nine thousand, two hundred thirty-one".