65451671 has 2 divisors, whose sum is σ = 65451672. Its totient is φ = 65451670.

The previous prime is 65451647. The next prime is 65451679. The reversal of 65451671 is 17615456.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65451671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65451679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32725835 + 32725836.

It is an arithmetic number, because the mean of its divisors is an integer number (32725836).

Almost surely, 2^65451671 is an apocalyptic number.

65451671 is a deficient number, since it is larger than the sum of its proper divisors (1).

65451671 is an equidigital number, since it uses as much as digits as its factorization.

65451671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 35.

The square root of 65451671 is about 8090.2207015631. The cubic root of 65451671 is about 403.0017322447.

It can be divided in two parts, 654 and 51671, that added together give a palindrome (52325).

The spelling of 65451671 in words is "sixty-five million, four hundred fifty-one thousand, six hundred seventy-one".