55666667911 has 2 divisors, whose sum is σ = 55666667912. Its totient is φ = 55666667910.

The previous prime is 55666667873. The next prime is 55666667921. The reversal of 55666667911 is 11976666655.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55666667911 - 2¹⁹ = 55666143623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55666667921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27833333955 + 27833333956.

It is an arithmetic number, because the mean of its divisors is an integer number (27833333956).

Almost surely, 2^55666667911 is an apocalyptic number.

55666667911 is a deficient number, since it is larger than the sum of its proper divisors (1).

55666667911 is an equidigital number, since it uses as much as digits as its factorization.

55666667911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12247200, while the sum is 58.

The spelling of 55666667911 in words is "fifty-five billion, six hundred sixty-six million, six hundred sixty-seven thousand, nine hundred eleven".