66116647 has 2 divisors, whose sum is σ = 66116648. Its totient is φ = 66116646.

The previous prime is 66116629. The next prime is 66116653. The reversal of 66116647 is 74661166.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66116647 is a prime.

It is a super-2 number, since 2×66116647² = 8742822021045218, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66116047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33058323 + 33058324.

It is an arithmetic number, because the mean of its divisors is an integer number (33058324).

Almost surely, 2^66116647 is an apocalyptic number.

66116647 is a deficient number, since it is larger than the sum of its proper divisors (1).

66116647 is an equidigital number, since it uses as much as digits as its factorization.

66116647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 66116647 is about 8131.2143619511. The cubic root of 66116647 is about 404.3619420035.

The spelling of 66116647 in words is "sixty-six million, one hundred sixteen thousand, six hundred forty-seven".