66195119 has 2 divisors, whose sum is σ = 66195120. Its totient is φ = 66195118.

The previous prime is 66195091. The next prime is 66195121. The reversal of 66195119 is 91159166.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66195119 - 2¹² = 66191023 is a prime.

It is a super-2 number, since 2×66195119² = 8763587558848322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 66195121, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66195149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33097559 + 33097560.

It is an arithmetic number, because the mean of its divisors is an integer number (33097560).

Almost surely, 2^66195119 is an apocalyptic number.

66195119 is a deficient number, since it is larger than the sum of its proper divisors (1).

66195119 is an equidigital number, since it uses as much as digits as its factorization.

66195119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14580, while the sum is 38.

The square root of 66195119 is about 8136.0382865373. The cubic root of 66195119 is about 404.5218540501.

The spelling of 66195119 in words is "sixty-six million, one hundred ninety-five thousand, one hundred nineteen".