66061002191 has 2 divisors, whose sum is σ = 66061002192. Its totient is φ = 66061002190.

The previous prime is 66061002113. The next prime is 66061002193. The reversal of 66061002191 is 19120016066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66061002191 - 2¹⁴ = 66060985807 is a prime.

Together with 66061002193, 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 (66061002193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33030501095 + 33030501096.

It is an arithmetic number, because the mean of its divisors is an integer number (33030501096).

Almost surely, 2^66061002191 is an apocalyptic number.

66061002191 is a deficient number, since it is larger than the sum of its proper divisors (1).

66061002191 is an equidigital number, since it uses as much as digits as its factorization.

66061002191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The spelling of 66061002191 in words is "sixty-six billion, sixty-one million, two thousand, one hundred ninety-one".