66026231 has 2 divisors, whose sum is σ = 66026232. Its totient is φ = 66026230.

The previous prime is 66026209. The next prime is 66026267. The reversal of 66026231 is 13262066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66026231 - 2¹⁰ = 66025207 is a prime.

It is a super-2 number, since 2×66026231² = 8718926360130722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66026231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66026201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33013115 + 33013116.

It is an arithmetic number, because the mean of its divisors is an integer number (33013116).

Almost surely, 2^66026231 is an apocalyptic number.

66026231 is a deficient number, since it is larger than the sum of its proper divisors (1).

66026231 is an equidigital number, since it uses as much as digits as its factorization.

66026231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 66026231 is about 8125.6526507106. The cubic root of 66026231 is about 404.1775332372.

Adding to 66026231 its reverse (13262066), we get a palindrome (79288297).

The spelling of 66026231 in words is "sixty-six million, twenty-six thousand, two hundred thirty-one".