66530047 has 2 divisors, whose sum is σ = 66530048. Its totient is φ = 66530046.

The previous prime is 66530041. The next prime is 66530071. The reversal of 66530047 is 74003566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66530047 - 2⁷ = 66529919 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66530041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33265023 + 33265024.

It is an arithmetic number, because the mean of its divisors is an integer number (33265024).

Almost surely, 2^66530047 is an apocalyptic number.

66530047 is a deficient number, since it is larger than the sum of its proper divisors (1).

66530047 is an equidigital number, since it uses as much as digits as its factorization.

66530047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 66530047 is about 8156.5953068667. The cubic root of 66530047 is about 405.2029608130.

The spelling of 66530047 in words is "sixty-six million, five hundred thirty thousand, forty-seven".