65660110500497 has 4 divisors (see below), whose sum is σ = 65664373882596. Its totient is φ = 65655847118400.

The previous prime is 65660110500437. The next prime is 65660110500499. The reversal of 65660110500497 is 79400501106656.

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

It can be written as a sum of positive squares in 2 ways, for example, as 55213355663761 + 10446754836736 = 7430569^2 + 3232144^2 .

It is a cyclic number.

It is not a de Polignac number, because 65660110500497 - 2⁶ = 65660110500433 is a prime.

It is a super-2 number, since 2×65660110500497² (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 (65660110500499) 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, 2131667948 + ... + 2131698749.

It is an arithmetic number, because the mean of its divisors is an integer number (16416093470649).

Almost surely, 2^{65660110500497} is an apocalyptic number.

It is an amenable number.

65660110500497 is a deficient number, since it is larger than the sum of its proper divisors (4263382099).

65660110500497 is a wasteful number, since it uses less digits than its factorization.

65660110500497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4263382098.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The spelling of 65660110500497 in words is "sixty-five trillion, six hundred sixty billion, one hundred ten million, five hundred thousand, four hundred ninety-seven".