66231532074623 has 2 divisors, whose sum is σ = 66231532074624. Its totient is φ = 66231532074622.

The previous prime is 66231532074563. The next prime is 66231532074727. The reversal of 66231532074623 is 32647023513266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66231532074623 - 2⁶ = 66231532074559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66231532074523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33115766037311 + 33115766037312.

It is an arithmetic number, because the mean of its divisors is an integer number (33115766037312).

Almost surely, 2^{66231532074623} is an apocalyptic number.

66231532074623 is a deficient number, since it is larger than the sum of its proper divisors (1).

66231532074623 is an equidigital number, since it uses as much as digits as its factorization.

66231532074623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 50.

Adding to 66231532074623 its reverse (32647023513266), we get a palindrome (98878555587889).

The spelling of 66231532074623 in words is "sixty-six trillion, two hundred thirty-one billion, five hundred thirty-two million, seventy-four thousand, six hundred twenty-three".