66147097 has 2 divisors, whose sum is σ = 66147098. Its totient is φ = 66147096.

The previous prime is 66147089. The next prime is 66147131. The reversal of 66147097 is 79074166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62552281 + 3594816 = 7909^2 + 1896^2 .

It is a cyclic number.

It is not a de Polignac number, because 66147097 - 2³ = 66147089 is a prime.

It is not a weakly prime, because it can be changed into another prime (66147007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33073548 + 33073549.

It is an arithmetic number, because the mean of its divisors is an integer number (33073549).

Almost surely, 2^66147097 is an apocalyptic number.

It is an amenable number.

66147097 is a deficient number, since it is larger than the sum of its proper divisors (1).

66147097 is an equidigital number, since it uses as much as digits as its factorization.

66147097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 66147097 is about 8133.0865604640. The cubic root of 66147097 is about 404.4240087293.

The spelling of 66147097 in words is "sixty-six million, one hundred forty-seven thousand, ninety-seven".