66267073 has 4 divisors (see below), whose sum is σ = 66457300. Its totient is φ = 66076848.

The previous prime is 66267067. The next prime is 66267077. The reversal of 66267073 is 37076266.

It is a happy number.

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 58018689 + 8248384 = 7617^2 + 2872^2 .

It is a cyclic number.

It is not a de Polignac number, because 66267073 - 2²¹ = 64169921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66267077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94590 + ... + 95287.

It is an arithmetic number, because the mean of its divisors is an integer number (16614325).

Almost surely, 2^66267073 is an apocalyptic number.

It is an amenable number.

66267073 is a deficient number, since it is larger than the sum of its proper divisors (190227).

66267073 is a wasteful number, since it uses less digits than its factorization.

66267073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190226.

The product of its (nonzero) digits is 63504, while the sum is 37.

The square root of 66267073 is about 8140.4590165420. The cubic root of 66267073 is about 404.6683725340.

The spelling of 66267073 in words is "sixty-six million, two hundred sixty-seven thousand, seventy-three".