66036320 has 72 divisors (see below), whose sum is σ = 181503504. Its totient is φ = 22638336.

The previous prime is 66036307. The next prime is 66036389. The reversal of 66036320 is 2363066.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66036320.

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, 3629 + ... + 12051.

It is an arithmetic number, because the mean of its divisors is an integer number (2520882).

Almost surely, 2^66036320 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 66036320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90751752).

66036320 is an abundant number, since it is smaller than the sum of its proper divisors (115467184).

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

66036320 is a wasteful number, since it uses less digits than its factorization.

66036320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8452 (or 8437 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 66036320 is about 8126.2734386679. The cubic root of 66036320 is about 404.1981186893.

Adding to 66036320 its reverse (2363066), we get a palindrome (68399386).

The spelling of 66036320 in words is "sixty-six million, thirty-six thousand, three hundred twenty".