66363823 has 2 divisors, whose sum is σ = 66363824. Its totient is φ = 66363822.

The previous prime is 66363821. The next prime is 66363833. The reversal of 66363823 is 32836366.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66363823 - 2¹ = 66363821 is a prime.

Together with 66363821, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66363821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33181911 + 33181912.

It is an arithmetic number, because the mean of its divisors is an integer number (33181912).

Almost surely, 2^66363823 is an apocalyptic number.

66363823 is a deficient number, since it is larger than the sum of its proper divisors (1).

66363823 is an equidigital number, since it uses as much as digits as its factorization.

66363823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 37.

The square root of 66363823 is about 8146.3993886870. The cubic root of 66363823 is about 404.8652155255.

The spelling of 66363823 in words is "sixty-six million, three hundred sixty-three thousand, eight hundred twenty-three".