65500520006659 has 4 divisors (see below), whose sum is σ = 67098093665400. Its totient is φ = 63902946347920.

The previous prime is 65500520006657. The next prime is 65500520006671. The reversal of 65500520006659 is 95660002500556.

It is a happy number.

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 65500520006659 - 2¹ = 65500520006657 is a prime.

It is a super-2 number, since 2×65500520006659² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65500520006657) 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, 798786829309 + ... + 798786829390.

It is an arithmetic number, because the mean of its divisors is an integer number (16774523416350).

Almost surely, 2^{65500520006659} is an apocalyptic number.

65500520006659 is a deficient number, since it is larger than the sum of its proper divisors (1597573658741).

65500520006659 is a wasteful number, since it uses less digits than its factorization.

65500520006659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597573658740.

The product of its (nonzero) digits is 2430000, while the sum is 49.

The spelling of 65500520006659 in words is "sixty-five trillion, five hundred billion, five hundred twenty million, six thousand, six hundred fifty-nine".