55166616 has 64 divisors (see below), whose sum is σ = 154879200. Its totient is φ = 18192384.

The previous prime is 55166609. The next prime is 55166621. The reversal of 55166616 is 61666155.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent 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, 19636 + ... + 22268.

Almost surely, 2^55166616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55166616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77439600).

55166616 is an abundant number, since it is smaller than the sum of its proper divisors (99712584).

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

55166616 is a wasteful number, since it uses less digits than its factorization.

55166616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2745 (or 2735 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 55166616 is about 7427.4232409363. The cubic root of 55166616 is about 380.6788787812.

The spelling of 55166616 in words is "fifty-five million, one hundred sixty-six thousand, six hundred sixteen".