55665128 has 16 divisors (see below), whose sum is σ = 105802980. Its totient is φ = 27451008.

The previous prime is 55665109. The next prime is 55665163. The reversal of 55665128 is 82156655.

It can be written as a sum of positive squares in 2 ways, for example, as 51008164 + 4656964 = 7142^2 + 2158^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55665091 and 55665100.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47075 + ... + 48242.

Almost surely, 2^55665128 is an apocalyptic number.

It is an amenable number.

55665128 is a deficient number, since it is larger than the sum of its proper divisors (50137852).

55665128 is a wasteful number, since it uses less digits than its factorization.

55665128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95396 (or 95392 counting only the distinct ones).

The product of its digits is 72000, while the sum is 38.

The square root of 55665128 is about 7460.9066473184. The cubic root of 55665128 is about 381.8221077175.

The spelling of 55665128 in words is "fifty-five million, six hundred sixty-five thousand, one hundred twenty-eight".