66560312 has 64 divisors (see below), whose sum is σ = 154795200. Its totient is φ = 26282880.

The previous prime is 66560311. The next prime is 66560323. The reversal of 66560312 is 21306566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66560311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122762 + ... + 123302.

It is an arithmetic number, because the mean of its divisors is an integer number (2418675).

Almost surely, 2^66560312 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 66560312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77397600).

66560312 is an abundant number, since it is smaller than the sum of its proper divisors (88234888).

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

66560312 is a wasteful number, since it uses less digits than its factorization.

66560312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 66560312 is about 8158.4503430492. The cubic root of 66560312 is about 405.2643947517.

Adding to 66560312 its reverse (21306566), we get a palindrome (87866878).

The spelling of 66560312 in words is "sixty-six million, five hundred sixty thousand, three hundred twelve".