66210719 has 2 divisors, whose sum is σ = 66210720. Its totient is φ = 66210718.

The previous prime is 66210701. The next prime is 66210737. The reversal of 66210719 is 91701266.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (66210701) and next prime (66210737).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66210719 is a prime.

It is a super-2 number, since 2×66210719² = 8767718620993922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66210779) 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, 33105359 + 33105360.

It is an arithmetic number, because the mean of its divisors is an integer number (33105360).

Almost surely, 2^66210719 is an apocalyptic number.

66210719 is a deficient number, since it is larger than the sum of its proper divisors (1).

66210719 is an equidigital number, since it uses as much as digits as its factorization.

66210719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 66210719 is about 8136.9969276140. The cubic root of 66210719 is about 404.5536290276.

The spelling of 66210719 in words is "sixty-six million, two hundred ten thousand, seven hundred nineteen".