6516605554 has 16 divisors (see below), whose sum is σ = 9987234048. Its totient is φ = 3187588032.

The previous prime is 6516605551. The next prime is 6516605569. The reversal of 6516605554 is 4555066156.

It is a super-2 number, since 2×6516605554² = 84932295892847293832, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6516605554.

It is not an unprimeable number, because it can be changed into a prime (6516605551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221434 + ... + 249130.

It is an arithmetic number, because the mean of its divisors is an integer number (624202128).

Almost surely, 2^6516605554 is an apocalyptic number.

6516605554 is a deficient number, since it is larger than the sum of its proper divisors (3470628494).

6516605554 is a wasteful number, since it uses less digits than its factorization.

6516605554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30249.

The product of its (nonzero) digits is 540000, while the sum is 43.

The square root of 6516605554 is about 80725.4950681629. The cubic root of 6516605554 is about 1867.8434684057.

The spelling of 6516605554 in words is "six billion, five hundred sixteen million, six hundred five thousand, five hundred fifty-four".