66207671 has 2 divisors, whose sum is σ = 66207672. Its totient is φ = 66207670.

The previous prime is 66207643. The next prime is 66207697. The reversal of 66207671 is 17670266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66207671 - 2¹⁸ = 65945527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66207601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33103835 + 33103836.

It is an arithmetic number, because the mean of its divisors is an integer number (33103836).

Almost surely, 2^66207671 is an apocalyptic number.

66207671 is a deficient number, since it is larger than the sum of its proper divisors (1).

66207671 is an equidigital number, since it uses as much as digits as its factorization.

66207671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 66207671 is about 8136.8096327738. The cubic root of 66207671 is about 404.5474210782.

The spelling of 66207671 in words is "sixty-six million, two hundred seven thousand, six hundred seventy-one".