855566711 has 2 divisors, whose sum is σ = 855566712. Its totient is φ = 855566710.

The previous prime is 855566693. The next prime is 855566741. The reversal of 855566711 is 117665558.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 855566711 - 2²² = 851372407 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855566741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427783355 + 427783356.

It is an arithmetic number, because the mean of its divisors is an integer number (427783356).

Almost surely, 2^855566711 is an apocalyptic number.

855566711 is a deficient number, since it is larger than the sum of its proper divisors (1).

855566711 is an equidigital number, since it uses as much as digits as its factorization.

855566711 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252000, while the sum is 44.

The square root of 855566711 is about 29250.0719828174. The cubic root of 855566711 is about 949.3316484659.

The spelling of 855566711 in words is "eight hundred fifty-five million, five hundred sixty-six thousand, seven hundred eleven".