65697813616487 has 8 divisors (see below), whose sum is σ = 70799589154560. Its totient is φ = 60602909159520.

The previous prime is 65697813616481. The next prime is 65697813616489. The reversal of 65697813616487 is 78461631879656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65697813616487 - 2³⁴ = 65680633747303 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 (65697813616481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1717750412 + ... + 1717788657.

It is an arithmetic number, because the mean of its divisors is an integer number (8849948644320).

Almost surely, 2^{65697813616487} is an apocalyptic number.

65697813616487 is a deficient number, since it is larger than the sum of its proper divisors (5101775538073).

65697813616487 is a wasteful number, since it uses less digits than its factorization.

65697813616487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3435540553.

The product of its digits is 2194698240, while the sum is 77.

The spelling of 65697813616487 in words is "sixty-five trillion, six hundred ninety-seven billion, eight hundred thirteen million, six hundred sixteen thousand, four hundred eighty-seven".