6540554566 has 128 divisors (see below), whose sum is σ = 13089162240. Its totient is φ = 2379456000.

The previous prime is 6540554557. The next prime is 6540554591. The reversal of 6540554566 is 6654550456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21304585 + ... + 21304891.

It is an arithmetic number, because the mean of its divisors is an integer number (102259080).

Almost surely, 2^6540554566 is an apocalyptic number.

6540554566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

6540554566 is a wasteful number, since it uses less digits than its factorization.

6540554566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510.

The product of its (nonzero) digits is 2160000, while the sum is 46.

The square root of 6540554566 is about 80873.6951424875. The cubic root of 6540554566 is about 1870.1288258070.

The spelling of 6540554566 in words is "six billion, five hundred forty million, five hundred fifty-four thousand, five hundred sixty-six".