66373729 has 8 divisors (see below), whose sum is σ = 71774208. Its totient is φ = 61139520.

The previous prime is 66373679. The next prime is 66373733. The reversal of 66373729 is 92737366.

66373729 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 a cyclic number.

It is not a de Polignac number, because 66373729 - 2⁹ = 66373217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66373739) 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, 40737 + ... + 42334.

It is an arithmetic number, because the mean of its divisors is an integer number (8971776).

Almost surely, 2^66373729 is an apocalyptic number.

It is an amenable number.

66373729 is a deficient number, since it is larger than the sum of its proper divisors (5400479).

66373729 is a wasteful number, since it uses less digits than its factorization.

66373729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83135.

The product of its digits is 285768, while the sum is 43.

The square root of 66373729 is about 8147.0073646708. The cubic root of 66373729 is about 404.8853590069.

The spelling of 66373729 in words is "sixty-six million, three hundred seventy-three thousand, seven hundred twenty-nine".