66363623 has 2 divisors, whose sum is σ = 66363624. Its totient is φ = 66363622.

The previous prime is 66363611. The next prime is 66363679. The reversal of 66363623 is 32636366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66363623 - 2¹⁸ = 66101479 is a prime.

It is a super-2 number, since 2×66363623² = 8808260915372258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66363823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33181811 + 33181812.

It is an arithmetic number, because the mean of its divisors is an integer number (33181812).

Almost surely, 2^66363623 is an apocalyptic number.

66363623 is a deficient number, since it is larger than the sum of its proper divisors (1).

66363623 is an equidigital number, since it uses as much as digits as its factorization.

66363623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 35.

The square root of 66363623 is about 8146.3871133159. The cubic root of 66363623 is about 404.8648088123.

Adding to 66363623 its reverse (32636366), we get a palindrome (98999989).

The spelling of 66363623 in words is "sixty-six million, three hundred sixty-three thousand, six hundred twenty-three".