2091706655 has 8 divisors (see below), whose sum is σ = 2540290032. Its totient is φ = 1653203968.

The previous prime is 2091706651. The next prime is 2091706657. The reversal of 2091706655 is 5566071902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2091706655 - 2² = 2091706651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091706651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2519714 + ... + 2520543.

It is an arithmetic number, because the mean of its divisors is an integer number (317536254).

Almost surely, 2^2091706655 is an apocalyptic number.

2091706655 is a deficient number, since it is larger than the sum of its proper divisors (448583377).

2091706655 is an equidigital number, since it uses as much as digits as its factorization.

2091706655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5040345.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 2091706655 is about 45735.1796213812. The cubic root of 2091706655 is about 1278.8911814709.

The spelling of 2091706655 in words is "two billion, ninety-one million, seven hundred six thousand, six hundred fifty-five".