66351319 has 2 divisors, whose sum is σ = 66351320. Its totient is φ = 66351318.

The previous prime is 66351317. The next prime is 66351353. The reversal of 66351319 is 91315366.

It is an a-pointer prime, because the next prime (66351353) can be obtained adding 66351319 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66351319 - 2¹ = 66351317 is a prime.

It is a super-2 number, since 2×66351319² = 8804995066079522, which contains 22 as substring.

Together with 66351317, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66351317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33175659 + 33175660.

It is an arithmetic number, because the mean of its divisors is an integer number (33175660).

Almost surely, 2^66351319 is an apocalyptic number.

66351319 is a deficient number, since it is larger than the sum of its proper divisors (1).

66351319 is an equidigital number, since it uses as much as digits as its factorization.

66351319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14580, while the sum is 34.

The square root of 66351319 is about 8145.6318969126. The cubic root of 66351319 is about 404.8397862459.

The spelling of 66351319 in words is "sixty-six million, three hundred fifty-one thousand, three hundred nineteen".