66805488 has 60 divisors (see below), whose sum is σ = 191328280. Its totient is φ = 21748608.

The previous prime is 66805477. The next prime is 66805537. The reversal of 66805488 is 88450866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 798 + ... + 11586.

Almost surely, 2^66805488 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 66805488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95664140).

66805488 is an abundant number, since it is smaller than the sum of its proper divisors (124522792).

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

66805488 is a wasteful number, since it uses less digits than its factorization.

66805488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10846 (or 10837 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The square root of 66805488 is about 8173.4624242117. The cubic root of 66805488 is about 405.7613843736.

The spelling of 66805488 in words is "sixty-six million, eight hundred five thousand, four hundred eighty-eight".