6516066615650 has 12 divisors (see below), whose sum is σ = 12119883905202. Its totient is φ = 2606426646240.

The previous prime is 6516066615631. The next prime is 6516066615673. The reversal of 6516066615650 is 565166606156.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 5858389408921 + 657677206729 = 2420411^2 + 810973^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6516066615592 and 6516066615601.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65160666107 + ... + 65160666206.

Almost surely, 2^{6516066615650} is an apocalyptic number.

6516066615650 is a deficient number, since it is larger than the sum of its proper divisors (5603817289552).

6516066615650 is a wasteful number, since it uses less digits than its factorization.

6516066615650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130321332325 (or 130321332320 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 53.

The spelling of 6516066615650 in words is "six trillion, five hundred sixteen billion, sixty-six million, six hundred fifteen thousand, six hundred fifty".