66504023 has 2 divisors, whose sum is σ = 66504024. Its totient is φ = 66504022.

The previous prime is 66504019. The next prime is 66504041. The reversal of 66504023 is 32040566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66504023 - 2² = 66504019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66503983 and 66504001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66504043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33252011 + 33252012.

It is an arithmetic number, because the mean of its divisors is an integer number (33252012).

Almost surely, 2^66504023 is an apocalyptic number.

66504023 is a deficient number, since it is larger than the sum of its proper divisors (1).

66504023 is an equidigital number, since it uses as much as digits as its factorization.

66504023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 66504023 is about 8154.9998773758. Note that the first 3 decimals coincide. The cubic root of 66504023 is about 405.1501206424.

Adding to 66504023 its reverse (32040566), we get a palindrome (98544589).

The spelling of 66504023 in words is "sixty-six million, five hundred four thousand, twenty-three".