55661116 has 24 divisors (see below), whose sum is σ = 111512576. Its totient is φ = 23814000.

The previous prime is 55661107. The next prime is 55661129. The reversal of 55661116 is 61116655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19705 + ... + 22351.

Almost surely, 2^55661116 is an apocalyptic number.

It is an amenable number.

55661116 is an abundant number, since it is smaller than the sum of its proper divisors (55851460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55661116 is a wasteful number, since it uses less digits than its factorization.

55661116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3409 (or 3407 counting only the distinct ones).

The product of its digits is 5400, while the sum is 31.

The square root of 55661116 is about 7460.6377743461. The cubic root of 55661116 is about 381.8129343675.

The spelling of 55661116 in words is "fifty-five million, six hundred sixty-one thousand, one hundred sixteen".