660135245191 has 2 divisors, whose sum is σ = 660135245192. Its totient is φ = 660135245190.

The previous prime is 660135245183. The next prime is 660135245219. The reversal of 660135245191 is 191542531066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 660135245191 - 2³ = 660135245183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660135245101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330067622595 + 330067622596.

It is an arithmetic number, because the mean of its divisors is an integer number (330067622596).

Almost surely, 2^660135245191 is an apocalyptic number.

660135245191 is a deficient number, since it is larger than the sum of its proper divisors (1).

660135245191 is an equidigital number, since it uses as much as digits as its factorization.

660135245191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 660135245191 in words is "six hundred sixty billion, one hundred thirty-five million, two hundred forty-five thousand, one hundred ninety-one".