66396023 has 2 divisors, whose sum is σ = 66396024. Its totient is φ = 66396022.

The previous prime is 66395983. The next prime is 66396061. The reversal of 66396023 is 32069366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66396023 - 2¹⁴ = 66379639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66396923) 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, 33198011 + 33198012.

It is an arithmetic number, because the mean of its divisors is an integer number (33198012).

Almost surely, 2^66396023 is an apocalyptic number.

66396023 is a deficient number, since it is larger than the sum of its proper divisors (1).

66396023 is an equidigital number, since it uses as much as digits as its factorization.

66396023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 66396023 is about 8148.3754822664. The cubic root of 66396023 is about 404.9306856940.

The spelling of 66396023 in words is "sixty-six million, three hundred ninety-six thousand, twenty-three".