65541787 has 4 divisors (see below), whose sum is σ = 65571696. Its totient is φ = 65511880.

The previous prime is 65541757. The next prime is 65541803. The reversal of 65541787 is 78714556.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65541787 - 2¹⁵ = 65509019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65541727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11383 + ... + 16144.

It is an arithmetic number, because the mean of its divisors is an integer number (16392924).

Almost surely, 2^65541787 is an apocalyptic number.

65541787 is a deficient number, since it is larger than the sum of its proper divisors (29909).

65541787 is a wasteful number, since it uses less digits than its factorization.

65541787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29908.

The product of its digits is 235200, while the sum is 43.

The square root of 65541787 is about 8095.7882259852. The cubic root of 65541787 is about 403.1866027445.

The spelling of 65541787 in words is "sixty-five million, five hundred forty-one thousand, seven hundred eighty-seven".