55516866 has 32 divisors (see below), whose sum is σ = 117884160. Its totient is φ = 17369856.

The previous prime is 55516831. The next prime is 55516919. The reversal of 55516866 is 66861555.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72960 + ... + 73716.

It is an arithmetic number, because the mean of its divisors is an integer number (3683880).

Almost surely, 2^55516866 is an apocalyptic number.

55516866 is an abundant number, since it is smaller than the sum of its proper divisors (62367294).

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

55516866 is a wasteful number, since it uses less digits than its factorization.

55516866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498.

The product of its digits is 216000, while the sum is 42.

The square root of 55516866 is about 7450.9640986922. The cubic root of 55516866 is about 381.4828166439.

The spelling of 55516866 in words is "fifty-five million, five hundred sixteen thousand, eight hundred sixty-six".