66826273 has 4 divisors (see below), whose sum is σ = 67577220. Its totient is φ = 66075328.

The previous prime is 66826259. The next prime is 66826313. The reversal of 66826273 is 37262866.

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 4210704 + 62615569 = 2052^2 + 7913^2 .

It is a cyclic number.

It is not a de Polignac number, because 66826273 - 2⁹ = 66825761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66826373) 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, 375340 + ... + 375517.

It is an arithmetic number, because the mean of its divisors is an integer number (16894305).

Almost surely, 2^66826273 is an apocalyptic number.

It is an amenable number.

66826273 is a deficient number, since it is larger than the sum of its proper divisors (750947).

66826273 is an equidigital number, since it uses as much as digits as its factorization.

66826273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750946.

The product of its digits is 145152, while the sum is 40.

The square root of 66826273 is about 8174.7338182965. The cubic root of 66826273 is about 405.8034611356.

The spelling of 66826273 in words is "sixty-six million, eight hundred twenty-six thousand, two hundred seventy-three".