66040097 has 2 divisors, whose sum is σ = 66040098. Its totient is φ = 66040096.

The previous prime is 66040049. The next prime is 66040099. The reversal of 66040097 is 79004066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62742241 + 3297856 = 7921^2 + 1816^2 .

It is a cyclic number.

It is not a de Polignac number, because 66040097 - 2⁶ = 66040033 is a prime.

It is a super-2 number, since 2×66040097² = 8722588823538818, which contains 22 as substring.

Together with 66040099, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66040099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33020048 + 33020049.

It is an arithmetic number, because the mean of its divisors is an integer number (33020049).

Almost surely, 2^66040097 is an apocalyptic number.

It is an amenable number.

66040097 is a deficient number, since it is larger than the sum of its proper divisors (1).

66040097 is an equidigital number, since it uses as much as digits as its factorization.

66040097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 66040097 is about 8126.5058296909. The cubic root of 66040097 is about 404.2058246870.

The spelling of 66040097 in words is "sixty-six million, forty thousand, ninety-seven".