66427147 has 2 divisors, whose sum is σ = 66427148. Its totient is φ = 66427146.

The previous prime is 66427111. The next prime is 66427157. The reversal of 66427147 is 74172466.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66427147 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66427157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33213573 + 33213574.

It is an arithmetic number, because the mean of its divisors is an integer number (33213574).

Almost surely, 2^66427147 is an apocalyptic number.

66427147 is a deficient number, since it is larger than the sum of its proper divisors (1).

66427147 is an equidigital number, since it uses as much as digits as its factorization.

66427147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 37.

The square root of 66427147 is about 8150.2850870384. The cubic root of 66427147 is about 404.9939479866.

The spelling of 66427147 in words is "sixty-six million, four hundred twenty-seven thousand, one hundred forty-seven".