6551565516 has 18 divisors (see below), whose sum is σ = 16560901812. Its totient is φ = 2183855160.

The previous prime is 6551565499. The next prime is 6551565523. The reversal of 6551565516 is 6155651556.

6551565516 is a `hidden beast` number, since 65 + 5 + 15 + 65 + 516 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

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, 90993930 + ... + 90994001.

Almost surely, 2^6551565516 is an apocalyptic number.

It is an amenable number.

6551565516 is an abundant number, since it is smaller than the sum of its proper divisors (10009336296).

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

6551565516 is a wasteful number, since it uses less digits than its factorization.

6551565516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181987941 (or 181987936 counting only the distinct ones).

The product of its digits is 675000, while the sum is 45.

The square root of 6551565516 is about 80941.7414934964. The cubic root of 6551565516 is about 1871.1776843900.

The spelling of 6551565516 in words is "six billion, five hundred fifty-one million, five hundred sixty-five thousand, five hundred sixteen".