6550666161 has 32 divisors (see below), whose sum is σ = 9516552192. Its totient is φ = 3984046080.

The previous prime is 6550666159. The next prime is 6550666163. The reversal of 6550666161 is 1616660556.

It is an interprime number because it is at equal distance from previous prime (6550666159) and next prime (6550666163).

It is not a de Polignac number, because 6550666161 - 2¹ = 6550666159 is a prime.

It is a super-2 number, since 2×6550666161² = 85822454305740955842, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6550666163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1685941 + ... + 1689821.

It is an arithmetic number, because the mean of its divisors is an integer number (297392256).

Almost surely, 2^6550666161 is an apocalyptic number.

It is an amenable number.

6550666161 is a deficient number, since it is larger than the sum of its proper divisors (2965886031).

6550666161 is a wasteful number, since it uses less digits than its factorization.

6550666161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4393.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 6550666161 is about 80936.1857329588. The cubic root of 6550666161 is about 1871.0920595618.

The spelling of 6550666161 in words is "six billion, five hundred fifty million, six hundred sixty-six thousand, one hundred sixty-one".