66073237 has 4 divisors (see below), whose sum is σ = 69959916. Its totient is φ = 62186560.

The previous prime is 66073213. The next prime is 66073243. The reversal of 66073237 is 73237066.

It is a happy number.

66073237 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32421636 + 33651601 = 5694^2 + 5801^2 .

It is a cyclic number.

It is not a de Polignac number, because 66073237 - 2⁷ = 66073109 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 (66073207) 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 3 ways as a sum of consecutive naturals, for example, 1943314 + ... + 1943347.

It is an arithmetic number, because the mean of its divisors is an integer number (17489979).

Almost surely, 2^66073237 is an apocalyptic number.

It is an amenable number.

66073237 is a deficient number, since it is larger than the sum of its proper divisors (3886679).

66073237 is a wasteful number, since it uses less digits than its factorization.

66073237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3886678.

The product of its (nonzero) digits is 31752, while the sum is 34.

The square root of 66073237 is about 8128.5445806737. The cubic root of 66073237 is about 404.2734257435.

The spelling of 66073237 in words is "sixty-six million, seventy-three thousand, two hundred thirty-seven".