6556776556 has 36 divisors (see below), whose sum is σ = 12692792224. Its totient is φ = 2961335520.

The previous prime is 6556776553. The next prime is 6556776559.

6556776556 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (6556776553) and next prime (6556776559).

It is a super-2 number, since 2×6556776556² = 85982637610622442272, 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 6556776556.

It is not an unprimeable number, because it can be changed into a prime (6556776553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32845 + ... + 119131.

Almost surely, 2^6556776556 is an apocalyptic number.

It is an amenable number.

6556776556 is a deficient number, since it is larger than the sum of its proper divisors (6136015668).

6556776556 is a wasteful number, since it uses less digits than its factorization.

6556776556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86470 (or 86457 counting only the distinct ones).

The product of its digits is 39690000, while the sum is 58.

The square root of 6556776556 is about 80973.9251611283. The cubic root of 6556776556 is about 1871.6736573326.

The spelling of 6556776556 in words is "six billion, five hundred fifty-six million, seven hundred seventy-six thousand, five hundred fifty-six".