65775987059 has 4 divisors (see below), whose sum is σ = 65776502640. Its totient is φ = 65775471480.

The previous prime is 65775987037. The next prime is 65775987061. The reversal of 65775987059 is 95078957756.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 65775987059 - 2³² = 61481019763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65775987059.

It is not an unprimeable number, because it can be changed into a prime (65775987859) 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, 89789 + ... + 373649.

It is an arithmetic number, because the mean of its divisors is an integer number (16444125660).

Almost surely, 2^65775987059 is an apocalyptic number.

65775987059 is a deficient number, since it is larger than the sum of its proper divisors (515581).

65775987059 is a wasteful number, since it uses less digits than its factorization.

65775987059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515580.

The product of its (nonzero) digits is 166698000, while the sum is 68.

The spelling of 65775987059 in words is "sixty-five billion, seven hundred seventy-five million, nine hundred eighty-seven thousand, fifty-nine".