6515066165550 has 24 divisors (see below), whose sum is σ = 16157364090936. Its totient is φ = 1737350977440.

The previous prime is 6515066165533. The next prime is 6515066165561. The reversal of 6515066165550 is 555616605156.

It is a junction number, because it is equal to n+sod(n) for n = 6515066165493 and 6515066165502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21716887069 + ... + 21716887368.

It is an arithmetic number, because the mean of its divisors is an integer number (673223503789).

Almost surely, 2^{6515066165550} is an apocalyptic number.

6515066165550 is an abundant number, since it is smaller than the sum of its proper divisors (9642297925386).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6515066165550 is a wasteful number, since it uses less digits than its factorization.

6515066165550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43433774452 (or 43433774447 counting only the distinct ones).

The product of its (nonzero) digits is 4050000, while the sum is 51.

The spelling of 6515066165550 in words is "six trillion, five hundred fifteen billion, sixty-six million, one hundred sixty-five thousand, five hundred fifty".