66470671 has 2 divisors, whose sum is σ = 66470672. Its totient is φ = 66470670.

The previous prime is 66470669. The next prime is 66470689. The reversal of 66470671 is 17607466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66470671 - 2¹ = 66470669 is a prime.

Together with 66470669, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 66470671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66470771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33235335 + 33235336.

It is an arithmetic number, because the mean of its divisors is an integer number (33235336).

Almost surely, 2^66470671 is an apocalyptic number.

66470671 is a deficient number, since it is larger than the sum of its proper divisors (1).

66470671 is an equidigital number, since it uses as much as digits as its factorization.

66470671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 66470671 is about 8152.9547404607. The cubic root of 66470671 is about 405.0823812501.

The spelling of 66470671 in words is "sixty-six million, four hundred seventy thousand, six hundred seventy-one".