65540671 has 16 divisors (see below), whose sum is σ = 79315200. Its totient is φ = 52904448.

The previous prime is 65540647. The next prime is 65540687. The reversal of 65540671 is 17604556.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 65540671 - 2⁷ = 65540543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65540621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22431 + ... + 25183.

It is an arithmetic number, because the mean of its divisors is an integer number (4957200).

Almost surely, 2^65540671 is an apocalyptic number.

65540671 is a deficient number, since it is larger than the sum of its proper divisors (13774529).

65540671 is a wasteful number, since it uses less digits than its factorization.

65540671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2958.

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

The square root of 65540671 is about 8095.7193009639. The cubic root of 65540671 is about 403.1843143378.

The spelling of 65540671 in words is "sixty-five million, five hundred forty thousand, six hundred seventy-one".