66238830263 has 2 divisors, whose sum is σ = 66238830264. Its totient is φ = 66238830262.

The previous prime is 66238830257. The next prime is 66238830299. The reversal of 66238830263 is 36203883266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66238830263 - 2⁴ = 66238830247 is a prime.

It is a super-2 number, since 2×66238830263² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66238830563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33119415131 + 33119415132.

It is an arithmetic number, because the mean of its divisors is an integer number (33119415132).

Almost surely, 2^66238830263 is an apocalyptic number.

66238830263 is a deficient number, since it is larger than the sum of its proper divisors (1).

66238830263 is an equidigital number, since it uses as much as digits as its factorization.

66238830263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 47.

The spelling of 66238830263 in words is "sixty-six billion, two hundred thirty-eight million, eight hundred thirty thousand, two hundred sixty-three".