5655656661 has 16 divisors (see below), whose sum is σ = 7589111616. Its totient is φ = 3746347136.

The previous prime is 5655656653. The next prime is 5655656681. The reversal of 5655656661 is 1666565565.

It is a cyclic number.

It is not a de Polignac number, because 5655656661 - 2³ = 5655656653 is a prime.

It is a super-2 number, since 2×5655656661² = 63972904534227337842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5655656621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1473601 + ... + 1477433.

It is an arithmetic number, because the mean of its divisors is an integer number (474319476).

Almost surely, 2^5655656661 is an apocalyptic number.

It is an amenable number.

5655656661 is a deficient number, since it is larger than the sum of its proper divisors (1933454955).

5655656661 is a wasteful number, since it uses less digits than its factorization.

5655656661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6852.

The product of its digits is 4860000, while the sum is 51.

The square root of 5655656661 is about 75204.1000278575. The cubic root of 5655656661 is about 1781.6716884939.

The spelling of 5655656661 in words is "five billion, six hundred fifty-five million, six hundred fifty-six thousand, six hundred sixty-one".