66423277 has 2 divisors, whose sum is σ = 66423278. Its totient is φ = 66423276.

The previous prime is 66423271. The next prime is 66423283. The reversal of 66423277 is 77232466.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (66423271) and next prime (66423283).

It can be written as a sum of positive squares in only one way, i.e., 53275401 + 13147876 = 7299^2 + 3626^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66423277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66423271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33211638 + 33211639.

It is an arithmetic number, because the mean of its divisors is an integer number (33211639).

Almost surely, 2^66423277 is an apocalyptic number.

It is an amenable number.

66423277 is a deficient number, since it is larger than the sum of its proper divisors (1).

66423277 is an equidigital number, since it uses as much as digits as its factorization.

66423277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 37.

The square root of 66423277 is about 8150.0476685723. The cubic root of 66423277 is about 404.9860829440.

The spelling of 66423277 in words is "sixty-six million, four hundred twenty-three thousand, two hundred seventy-seven".