66321296 has 20 divisors (see below), whose sum is σ = 129213084. Its totient is φ = 32976000.

The previous prime is 66321293. The next prime is 66321317. The reversal of 66321296 is 69212366.

It can be written as a sum of positive squares in 2 ways, for example, as 32262400 + 34058896 = 5680^2 + 5836^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66321293) 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, 8555 + ... + 14346.

Almost surely, 2^66321296 is an apocalyptic number.

It is an amenable number.

66321296 is a deficient number, since it is larger than the sum of its proper divisors (62891788).

66321296 is a wasteful number, since it uses less digits than its factorization.

66321296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23090 (or 23084 counting only the distinct ones).

The product of its digits is 23328, while the sum is 35.

The square root of 66321296 is about 8143.7887988331. The cubic root of 66321296 is about 404.7787156759.

The spelling of 66321296 in words is "sixty-six million, three hundred twenty-one thousand, two hundred ninety-six".