2205678687 has 32 divisors (see below), whose sum is σ = 3089373696. Its totient is φ = 1398633600.

The previous prime is 2205678677. The next prime is 2205678697. The reversal of 2205678687 is 7868765022.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2205678677) and next prime (2205678697).

It is not a de Polignac number, because 2205678687 - 2¹² = 2205674591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2205678637) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 687028 + ... + 690230.

It is an arithmetic number, because the mean of its divisors is an integer number (96542928).

Almost surely, 2^2205678687 is an apocalyptic number.

2205678687 is a deficient number, since it is larger than the sum of its proper divisors (883695009).

2205678687 is a wasteful number, since it uses less digits than its factorization.

2205678687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3391.

The product of its (nonzero) digits is 2257920, while the sum is 51.

The square root of 2205678687 is about 46964.6535918237. The cubic root of 2205678687 is about 1301.7095235440.

The spelling of 2205678687 in words is "two billion, two hundred five million, six hundred seventy-eight thousand, six hundred eighty-seven".