66353863 has 2 divisors, whose sum is σ = 66353864. Its totient is φ = 66353862.

The previous prime is 66353851. The next prime is 66353887. The reversal of 66353863 is 36835366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66353863 - 2⁹ = 66353351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66353813) 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, 33176931 + 33176932.

It is an arithmetic number, because the mean of its divisors is an integer number (33176932).

Almost surely, 2^66353863 is an apocalyptic number.

66353863 is a deficient number, since it is larger than the sum of its proper divisors (1).

66353863 is an equidigital number, since it uses as much as digits as its factorization.

66353863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 40.

The square root of 66353863 is about 8145.7880527301. The cubic root of 66353863 is about 404.8449602162.

The spelling of 66353863 in words is "sixty-six million, three hundred fifty-three thousand, eight hundred sixty-three".