66312023 has 2 divisors, whose sum is σ = 66312024. Its totient is φ = 66312022.

The previous prime is 66311981. The next prime is 66312041. The reversal of 66312023 is 32021366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66312023 - 2²⁰ = 65263447 is a prime.

It is a super-4 number, since 4×66312023⁴ (a number of 32 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66312023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66312823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33156011 + 33156012.

It is an arithmetic number, because the mean of its divisors is an integer number (33156012).

Almost surely, 2^66312023 is an apocalyptic number.

66312023 is a deficient number, since it is larger than the sum of its proper divisors (1).

66312023 is an equidigital number, since it uses as much as digits as its factorization.

66312023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 66312023 is about 8143.2194493333. The cubic root of 66312023 is about 404.7598494987.

Adding to 66312023 its reverse (32021366), we get a palindrome (98333389).

The spelling of 66312023 in words is "sixty-six million, three hundred twelve thousand, twenty-three".