66113647 has 2 divisors, whose sum is σ = 66113648. Its totient is φ = 66113646.

The previous prime is 66113633. The next prime is 66113681. The reversal of 66113647 is 74631166.

It is an a-pointer prime, because the next prime (66113681) can be obtained adding 66113647 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66113647 - 2¹¹ = 66111599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66113617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33056823 + 33056824.

It is an arithmetic number, because the mean of its divisors is an integer number (33056824).

Almost surely, 2^66113647 is an apocalyptic number.

66113647 is a deficient number, since it is larger than the sum of its proper divisors (1).

66113647 is an equidigital number, since it uses as much as digits as its factorization.

66113647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 34.

The square root of 66113647 is about 8131.0298855680. The cubic root of 66113647 is about 404.3558260240.

The spelling of 66113647 in words is "sixty-six million, one hundred thirteen thousand, six hundred forty-seven".