6655656161 has 16 divisors (see below), whose sum is σ = 8343823488. Its totient is φ = 5157561600.

The previous prime is 6655656037. The next prime is 6655656187. The reversal of 6655656161 is 1616565566.

It is a cyclic number.

It is not a de Polignac number, because 6655656161 - 2¹⁸ = 6655394017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6655656191) 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, 224840 + ... + 252713.

It is an arithmetic number, because the mean of its divisors is an integer number (521488968).

Almost surely, 2^6655656161 is an apocalyptic number.

It is an amenable number.

6655656161 is a deficient number, since it is larger than the sum of its proper divisors (1688167327).

6655656161 is a wasteful number, since it uses less digits than its factorization.

6655656161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477752.

The product of its digits is 972000, while the sum is 47.

The square root of 6655656161 is about 81582.2049285259. The cubic root of 6655656161 is about 1881.0353585704.

The spelling of 6655656161 in words is "six billion, six hundred fifty-five million, six hundred fifty-six thousand, one hundred sixty-one".