66164671 has 2 divisors, whose sum is σ = 66164672. Its totient is φ = 66164670.

The previous prime is 66164653. The next prime is 66164677. The reversal of 66164671 is 17646166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66164671 - 2⁷ = 66164543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66164671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66164677) 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, 33082335 + 33082336.

It is an arithmetic number, because the mean of its divisors is an integer number (33082336).

Almost surely, 2^66164671 is an apocalyptic number.

66164671 is a deficient number, since it is larger than the sum of its proper divisors (1).

66164671 is an equidigital number, since it uses as much as digits as its factorization.

66164671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 66164671 is about 8134.1668903459. The cubic root of 66164671 is about 404.4598214282.

The spelling of 66164671 in words is "sixty-six million, one hundred sixty-four thousand, six hundred seventy-one".