6111666779 has 2 divisors, whose sum is σ = 6111666780. Its totient is φ = 6111666778.

The previous prime is 6111666739. The next prime is 6111666797. The reversal of 6111666779 is 9776661116.

It is a happy number.

Together with next prime (6111666797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6111666779 - 2²⁰ = 6110618203 is a prime.

It is not a weakly prime, because it can be changed into another prime (6111666739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3055833389 + 3055833390.

It is an arithmetic number, because the mean of its divisors is an integer number (3055833390).

Almost surely, 2^6111666779 is an apocalyptic number.

6111666779 is a deficient number, since it is larger than the sum of its proper divisors (1).

6111666779 is an equidigital number, since it uses as much as digits as its factorization.

6111666779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 50.

The square root of 6111666779 is about 78177.1499800293. The cubic root of 6111666779 is about 1828.3242624201.

The spelling of 6111666779 in words is "six billion, one hundred eleven million, six hundred sixty-six thousand, seven hundred seventy-nine".