66283331 has 2 divisors, whose sum is σ = 66283332. Its totient is φ = 66283330.

The previous prime is 66283313. The next prime is 66283333. The reversal of 66283331 is 13338266.

Together with previous prime (66283313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66283331 - 2¹⁸ = 66021187 is a prime.

It is a super-2 number, since 2×66283331² = 8786959936911122, which contains 22 as substring.

Together with 66283333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66283333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33141665 + 33141666.

It is an arithmetic number, because the mean of its divisors is an integer number (33141666).

Almost surely, 2^66283331 is an apocalyptic number.

66283331 is a deficient number, since it is larger than the sum of its proper divisors (1).

66283331 is an equidigital number, since it uses as much as digits as its factorization.

66283331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 32.

The square root of 66283331 is about 8141.4575476385. The cubic root of 66283331 is about 404.7014636814.

The spelling of 66283331 in words is "sixty-six million, two hundred eighty-three thousand, three hundred thirty-one".