66614273197 has 2 divisors, whose sum is σ = 66614273198. Its totient is φ = 66614273196.

The previous prime is 66614273179. The next prime is 66614273269. The reversal of 66614273197 is 79137241666.

Together with previous prime (66614273179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55152643716 + 11461629481 = 234846^2 + 107059^2 .

It is a cyclic number.

It is not a de Polignac number, because 66614273197 - 2⁷ = 66614273069 is a prime.

It is a super-3 number, since 3×66614273197³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66614273147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33307136598 + 33307136599.

It is an arithmetic number, because the mean of its divisors is an integer number (33307136599).

Almost surely, 2^66614273197 is an apocalyptic number.

It is an amenable number.

66614273197 is a deficient number, since it is larger than the sum of its proper divisors (1).

66614273197 is an equidigital number, since it uses as much as digits as its factorization.

66614273197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 52.

The spelling of 66614273197 in words is "sixty-six billion, six hundred fourteen million, two hundred seventy-three thousand, one hundred ninety-seven".