66566124 has 60 divisors (see below), whose sum is σ = 178296888. Its totient is φ = 21643200.

The previous prime is 66566099. The next prime is 66566131. The reversal of 66566124 is 42166566.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10779 + ... + 15789.

Almost surely, 2^66566124 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 66566124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89148444).

66566124 is an abundant number, since it is smaller than the sum of its proper divisors (111730764).

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

66566124 is a wasteful number, since it uses less digits than its factorization.

66566124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5068 (or 5057 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 66566124 is about 8158.8065303695. The cubic root of 66566124 is about 405.2761902098.

The spelling of 66566124 in words is "sixty-six million, five hundred sixty-six thousand, one hundred twenty-four".