55066788 has 216 divisors, whose sum is σ = 179262720. Its totient is φ = 14152320.

The previous prime is 55066783. The next prime is 55066793. The reversal of 55066788 is 88766055.

55066788 is a `hidden beast` number, since 5 + 506 + 67 + 88 = 666.

It is an interprime number because it is at equal distance from previous prime (55066783) and next prime (55066793).

It is a super-2 number, since 2×55066788² = 6064702281273888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55066783) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1038970 + ... + 1039022.

It is an arithmetic number, because the mean of its divisors is an integer number (829920).

Almost surely, 2^55066788 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 55066788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89631360).

55066788 is an abundant number, since it is smaller than the sum of its proper divisors (124195932).

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

55066788 is a wasteful number, since it uses less digits than its factorization.

55066788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 55066788 is about 7420.6999669842. The cubic root of 55066788 is about 380.4491181056.

The spelling of 55066788 in words is "fifty-five million, sixty-six thousand, seven hundred eighty-eight".