6655494293891 has 2 divisors, whose sum is σ = 6655494293892. Its totient is φ = 6655494293890.

The previous prime is 6655494293741. The next prime is 6655494293923. The reversal of 6655494293891 is 1983924945566.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6655494293891 is a prime.

It is not a weakly prime, because it can be changed into another prime (6655494292891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3327747146945 + 3327747146946.

It is an arithmetic number, because the mean of its divisors is an integer number (3327747146946).

Almost surely, 2^{6655494293891} is an apocalyptic number.

6655494293891 is a deficient number, since it is larger than the sum of its proper divisors (1).

6655494293891 is an equidigital number, since it uses as much as digits as its factorization.

6655494293891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 503884800, while the sum is 71.

The spelling of 6655494293891 in words is "six trillion, six hundred fifty-five billion, four hundred ninety-four million, two hundred ninety-three thousand, eight hundred ninety-one".