66354200111 has 2 divisors, whose sum is σ = 66354200112. Its totient is φ = 66354200110.

The previous prime is 66354199979. The next prime is 66354200117. The reversal of 66354200111 is 11100245366.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66354200111 - 2²² = 66350005807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66354200117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33177100055 + 33177100056.

It is an arithmetic number, because the mean of its divisors is an integer number (33177100056).

Almost surely, 2^66354200111 is an apocalyptic number.

66354200111 is a deficient number, since it is larger than the sum of its proper divisors (1).

66354200111 is an equidigital number, since it uses as much as digits as its factorization.

66354200111 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 29.

Adding to 66354200111 its reverse (11100245366), we get a palindrome (77454445477).

The spelling of 66354200111 in words is "sixty-six billion, three hundred fifty-four million, two hundred thousand, one hundred eleven".