66275999 has 2 divisors, whose sum is σ = 66276000. Its totient is φ = 66275998.

The previous prime is 66275987. The next prime is 66276011. The reversal of 66275999 is 99957266.

It is a balanced prime because it is at equal distance from previous prime (66275987) and next prime (66276011).

It is a cyclic number.

It is not a de Polignac number, because 66275999 - 2⁴ = 66275983 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66275999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66275899) 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, 33137999 + 33138000.

It is an arithmetic number, because the mean of its divisors is an integer number (33138000).

Almost surely, 2^66275999 is an apocalyptic number.

66275999 is a deficient number, since it is larger than the sum of its proper divisors (1).

66275999 is an equidigital number, since it uses as much as digits as its factorization.

66275999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1837080, while the sum is 53.

The square root of 66275999 is about 8141.0072472637. The cubic root of 66275999 is about 404.6865409726.

The spelling of 66275999 in words is "sixty-six million, two hundred seventy-five thousand, nine hundred ninety-nine".