65381671 has 2 divisors, whose sum is σ = 65381672. Its totient is φ = 65381670.

The previous prime is 65381651. The next prime is 65381681. The reversal of 65381671 is 17618356.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65381671 - 2⁹ = 65381159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65381671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65381611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32690835 + 32690836.

It is an arithmetic number, because the mean of its divisors is an integer number (32690836).

Almost surely, 2^65381671 is an apocalyptic number.

65381671 is a deficient number, since it is larger than the sum of its proper divisors (1).

65381671 is an equidigital number, since it uses as much as digits as its factorization.

65381671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 65381671 is about 8085.8933334543. The cubic root of 65381671 is about 402.8580120328.

The spelling of 65381671 in words is "sixty-five million, three hundred eighty-one thousand, six hundred seventy-one".