66810283 has 2 divisors, whose sum is σ = 66810284. Its totient is φ = 66810282.

The previous prime is 66810241. The next prime is 66810313. The reversal of 66810283 is 38201866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66810283 - 2¹⁷ = 66679211 is a prime.

It is a super-2 number, since 2×66810283² = 8927227829080178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66810203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33405141 + 33405142.

It is an arithmetic number, because the mean of its divisors is an integer number (33405142).

Almost surely, 2^66810283 is an apocalyptic number.

66810283 is a deficient number, since it is larger than the sum of its proper divisors (1).

66810283 is an equidigital number, since it uses as much as digits as its factorization.

66810283 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 66810283 is about 8173.7557462895. The cubic root of 66810283 is about 405.7710920555.

The spelling of 66810283 in words is "sixty-six million, eight hundred ten thousand, two hundred eighty-three".