65405671 has 2 divisors, whose sum is σ = 65405672. Its totient is φ = 65405670.

The previous prime is 65405651. The next prime is 65405687. The reversal of 65405671 is 17650456.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65405671 - 2¹¹ = 65403623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65405621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32702835 + 32702836.

It is an arithmetic number, because the mean of its divisors is an integer number (32702836).

Almost surely, 2^65405671 is an apocalyptic number.

65405671 is a deficient number, since it is larger than the sum of its proper divisors (1).

65405671 is an equidigital number, since it uses as much as digits as its factorization.

65405671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 65405671 is about 8087.3772633654. The cubic root of 65405671 is about 402.9072990850.

The spelling of 65405671 in words is "sixty-five million, four hundred five thousand, six hundred seventy-one".