5656866865 has 48 divisors (see below), whose sum is σ = 7764353280. Its totient is φ = 3943779840.

The previous prime is 5656866829. The next prime is 5656866869. The reversal of 5656866865 is 5686686565.

It is a happy number.

It is not a de Polignac number, because 5656866865 - 2¹¹ = 5656864817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5656866869) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7433085 + ... + 7433845.

It is an arithmetic number, because the mean of its divisors is an integer number (161757360).

Almost surely, 2^5656866865 is an apocalyptic number.

It is an amenable number.

5656866865 is a deficient number, since it is larger than the sum of its proper divisors (2107486415).

5656866865 is a wasteful number, since it uses less digits than its factorization.

5656866865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274 (or 1261 counting only the distinct ones).

The product of its digits is 62208000, while the sum is 61.

The square root of 5656866865 is about 75212.1457279341. The cubic root of 5656866865 is about 1781.7987608250.

The spelling of 5656866865 in words is "five billion, six hundred fifty-six million, eight hundred sixty-six thousand, eight hundred sixty-five".