66321460 has 12 divisors (see below), whose sum is σ = 139275108. Its totient is φ = 26528576.

The previous prime is 66321439. The next prime is 66321461. The reversal of 66321460 is 6412366.

It can be written as a sum of positive squares in 2 ways, for example, as 7246864 + 59074596 = 2692^2 + 7686^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66321461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1658017 + ... + 1658056.

It is an arithmetic number, because the mean of its divisors is an integer number (11606259).

Almost surely, 2^66321460 is an apocalyptic number.

It is an amenable number.

66321460 is an abundant number, since it is smaller than the sum of its proper divisors (72953648).

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

66321460 is a wasteful number, since it uses less digits than its factorization.

66321460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3316082 (or 3316080 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 66321460 is about 8143.7988678503. The cubic root of 66321460 is about 404.7790493227.

The spelling of 66321460 in words is "sixty-six million, three hundred twenty-one thousand, four hundred sixty".