66322749 has 8 divisors (see below), whose sum is σ = 93084640. Its totient is φ = 41888016.

The previous prime is 66322747. The next prime is 66322771. The reversal of 66322749 is 94722366.

66322749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66322749 - 2¹ = 66322747 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66322741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581722 + ... + 581835.

It is an arithmetic number, because the mean of its divisors is an integer number (11635580).

Almost surely, 2^66322749 is an apocalyptic number.

It is an amenable number.

66322749 is a deficient number, since it is larger than the sum of its proper divisors (26761891).

66322749 is a wasteful number, since it uses less digits than its factorization.

66322749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163579.

The product of its digits is 108864, while the sum is 39.

The square root of 66322749 is about 8143.8780074360. The cubic root of 66322749 is about 404.7816716856.

The spelling of 66322749 in words is "sixty-six million, three hundred twenty-two thousand, seven hundred forty-nine".