111666557011 has 2 divisors, whose sum is σ = 111666557012. Its totient is φ = 111666557010.

The previous prime is 111666557003. The next prime is 111666557027. The reversal of 111666557011 is 110755666111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111666557011 - 2³ = 111666557003 is a prime.

It is not a weakly prime, because it can be changed into another prime (111667557011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55833278505 + 55833278506.

It is an arithmetic number, because the mean of its divisors is an integer number (55833278506).

Almost surely, 2^111666557011 is an apocalyptic number.

111666557011 is a deficient number, since it is larger than the sum of its proper divisors (1).

111666557011 is an equidigital number, since it uses as much as digits as its factorization.

111666557011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 40.

The spelling of 111666557011 in words is "one hundred eleven billion, six hundred sixty-six million, five hundred fifty-seven thousand, eleven".