65711487 has 4 divisors (see below), whose sum is σ = 87615320. Its totient is φ = 43807656.

The previous prime is 65711453. The next prime is 65711491. The reversal of 65711487 is 78411756.

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

It is not a de Polignac number, because 65711487 - 2⁸ = 65711231 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 (65711407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10951912 + ... + 10951917.

It is an arithmetic number, because the mean of its divisors is an integer number (21903830).

Almost surely, 2^65711487 is an apocalyptic number.

65711487 is a deficient number, since it is larger than the sum of its proper divisors (21903833).

65711487 is a wasteful number, since it uses less digits than its factorization.

65711487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21903832.

The product of its digits is 47040, while the sum is 39.

The square root of 65711487 is about 8106.2622089345. The cubic root of 65711487 is about 403.5342781386.

The spelling of 65711487 in words is "sixty-five million, seven hundred eleven thousand, four hundred eighty-seven".