66321344 has 14 divisors (see below), whose sum is σ = 131606544. Its totient is φ = 33160640.

The previous prime is 66321331. The next prime is 66321373. The reversal of 66321344 is 44312366.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 518072 + ... + 518199.

Almost surely, 2^66321344 is an apocalyptic number.

66321344 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66321344 is a deficient number, since it is larger than the sum of its proper divisors (65285200).

66321344 is a wasteful number, since it uses less digits than its factorization.

66321344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036283 (or 1036273 counting only the distinct ones).

The product of its digits is 10368, while the sum is 29.

The square root of 66321344 is about 8143.7917458638. The cubic root of 66321344 is about 404.7788133287.

The spelling of 66321344 in words is "sixty-six million, three hundred twenty-one thousand, three hundred forty-four".