2660662687 has 4 divisors (see below), whose sum is σ = 2672383896. Its totient is φ = 2648941480.

The previous prime is 2660662679. The next prime is 2660662717. The reversal of 2660662687 is 7862660662.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7862660662 = 2 ⋅3931330331.

It is a cyclic number.

It is not a de Polignac number, because 2660662687 - 2³ = 2660662679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2660662687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660662987) 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, 5860264 + ... + 5860717.

It is an arithmetic number, because the mean of its divisors is an integer number (668095974).

Almost surely, 2^2660662687 is an apocalyptic number.

2660662687 is a deficient number, since it is larger than the sum of its proper divisors (11721209).

2660662687 is a wasteful number, since it uses less digits than its factorization.

2660662687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11721208.

The product of its (nonzero) digits is 1741824, while the sum is 49.

The square root of 2660662687 is about 51581.6119077332. The cubic root of 2660662687 is about 1385.6810349081.

The spelling of 2660662687 in words is "two billion, six hundred sixty million, six hundred sixty-two thousand, six hundred eighty-seven".