66266723 has 2 divisors, whose sum is σ = 66266724. Its totient is φ = 66266722.

The previous prime is 66266689. The next prime is 66266773. The reversal of 66266723 is 32766266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66266723 - 2⁸ = 66266467 is a prime.

It is not a weakly prime, because it can be changed into another prime (66266773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33133361 + 33133362.

It is an arithmetic number, because the mean of its divisors is an integer number (33133362).

Almost surely, 2^66266723 is an apocalyptic number.

66266723 is a deficient number, since it is larger than the sum of its proper divisors (1).

66266723 is an equidigital number, since it uses as much as digits as its factorization.

66266723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 38.

The square root of 66266723 is about 8140.4375189544. The cubic root of 66266723 is about 404.6676600928.

The spelling of 66266723 in words is "sixty-six million, two hundred sixty-six thousand, seven hundred twenty-three".