66624166223 has 2 divisors, whose sum is σ = 66624166224. Its totient is φ = 66624166222.

The previous prime is 66624166177. The next prime is 66624166249. The reversal of 66624166223 is 32266142666.

66624166223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66624166223 - 2³² = 62329198927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66624166123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33312083111 + 33312083112.

It is an arithmetic number, because the mean of its divisors is an integer number (33312083112).

Almost surely, 2^66624166223 is an apocalyptic number.

66624166223 is a deficient number, since it is larger than the sum of its proper divisors (1).

66624166223 is an equidigital number, since it uses as much as digits as its factorization.

66624166223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 44.

The spelling of 66624166223 in words is "sixty-six billion, six hundred twenty-four million, one hundred sixty-six thousand, two hundred twenty-three".