66310423 has 2 divisors, whose sum is σ = 66310424. Its totient is φ = 66310422.

The previous prime is 66310417. The next prime is 66310459. The reversal of 66310423 is 32401366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66310423 - 2²¹ = 64213271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66310463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33155211 + 33155212.

It is an arithmetic number, because the mean of its divisors is an integer number (33155212).

Almost surely, 2^66310423 is an apocalyptic number.

66310423 is a deficient number, since it is larger than the sum of its proper divisors (1).

66310423 is an equidigital number, since it uses as much as digits as its factorization.

66310423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 66310423 is about 8143.1212074978. The cubic root of 66310423 is about 404.7565940761.

Adding to 66310423 its reverse (32401366), we get a palindrome (98711789).

The spelling of 66310423 in words is "sixty-six million, three hundred ten thousand, four hundred twenty-three".