66650147 has 2 divisors, whose sum is σ = 66650148. Its totient is φ = 66650146.

The previous prime is 66650141. The next prime is 66650161. The reversal of 66650147 is 74105666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66650147 - 2¹² = 66646051 is a prime.

It is not a weakly prime, because it can be changed into another prime (66650141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33325073 + 33325074.

It is an arithmetic number, because the mean of its divisors is an integer number (33325074).

Almost surely, 2^66650147 is an apocalyptic number.

66650147 is a deficient number, since it is larger than the sum of its proper divisors (1).

66650147 is an equidigital number, since it uses as much as digits as its factorization.

66650147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 66650147 is about 8163.9541277496. The cubic root of 66650147 is about 405.4466382883.

The spelling of 66650147 in words is "sixty-six million, six hundred fifty thousand, one hundred forty-seven".