2667868656 has 20 divisors (see below), whose sum is σ = 6891994152. Its totient is φ = 889289536.

The previous prime is 2667868613. The next prime is 2667868657. The reversal of 2667868656 is 6568687662.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2667868656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2667868657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27790251 + ... + 27790346.

Almost surely, 2^2667868656 is an apocalyptic number.

It is an amenable number.

2667868656 is an abundant number, since it is smaller than the sum of its proper divisors (4224125496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2667868656 is a wasteful number, since it uses less digits than its factorization.

2667868656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55580608 (or 55580602 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 60.

The square root of 2667868656 is about 51651.4148499342. The cubic root of 2667868656 is about 1386.9308706183.

The spelling of 2667868656 in words is "two billion, six hundred sixty-seven million, eight hundred sixty-eight thousand, six hundred fifty-six".