65605787487 has 8 divisors (see below), whose sum is σ = 97193759280. Its totient is φ = 43737191640.

The previous prime is 65605787459. The next prime is 65605787497. The reversal of 65605787487 is 78478750656.

65605787487 is a `hidden beast` number, since 6 + 56 + 0 + 578 + 7 + 4 + 8 + 7 = 666.

It is not a de Polignac number, because 65605787487 - 2⁸ = 65605787231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65605787407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1214921964 + ... + 1214922017.

It is an arithmetic number, because the mean of its divisors is an integer number (12149219910).

Almost surely, 2^65605787487 is an apocalyptic number.

65605787487 is a deficient number, since it is larger than the sum of its proper divisors (31587971793).

65605787487 is a wasteful number, since it uses less digits than its factorization.

65605787487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429843990 (or 2429843984 counting only the distinct ones).

The product of its (nonzero) digits is 79027200, while the sum is 63.

The spelling of 65605787487 in words is "sixty-five billion, six hundred five million, seven hundred eighty-seven thousand, four hundred eighty-seven".