66145319 has 2 divisors, whose sum is σ = 66145320. Its totient is φ = 66145318.

The previous prime is 66145301. The next prime is 66145337. The reversal of 66145319 is 91354166.

It is a balanced prime because it is at equal distance from previous prime (66145301) and next prime (66145337).

It is a cyclic number.

It is not a de Polignac number, because 66145319 - 2⁸ = 66145063 is a prime.

It is a super-2 number, since 2×66145319² = 8750406451223522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66145369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33072659 + 33072660.

It is an arithmetic number, because the mean of its divisors is an integer number (33072660).

Almost surely, 2^66145319 is an apocalyptic number.

66145319 is a deficient number, since it is larger than the sum of its proper divisors (1).

66145319 is an equidigital number, since it uses as much as digits as its factorization.

66145319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 66145319 is about 8132.9772531343. The cubic root of 66145319 is about 404.4203851269.

The spelling of 66145319 in words is "sixty-six million, one hundred forty-five thousand, three hundred nineteen".