66455911 has 2 divisors, whose sum is σ = 66455912. Its totient is φ = 66455910.

The previous prime is 66455903. The next prime is 66455933. The reversal of 66455911 is 11955466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66455911 - 2³ = 66455903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66455951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33227955 + 33227956.

It is an arithmetic number, because the mean of its divisors is an integer number (33227956).

Almost surely, 2^66455911 is an apocalyptic number.

66455911 is a deficient number, since it is larger than the sum of its proper divisors (1).

66455911 is an equidigital number, since it uses as much as digits as its factorization.

66455911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 37.

The square root of 66455911 is about 8152.0494969057. The cubic root of 66455911 is about 405.0523958020.

The spelling of 66455911 in words is "sixty-six million, four hundred fifty-five thousand, nine hundred eleven".