6551556 has 24 divisors (see below), whose sum is σ = 16677024. Its totient is φ = 1985280.

The previous prime is 6551533. The next prime is 6551563.

6551556 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×6551556² = 85845772042272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24685 + ... + 24948.

It is an arithmetic number, because the mean of its divisors is an integer number (694876).

Almost surely, 2^6551556 is an apocalyptic number.

6551556 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

6551556 is an abundant number, since it is smaller than the sum of its proper divisors (10125468).

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

6551556 is a wasteful number, since it uses less digits than its factorization.

6551556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49651 (or 49649 counting only the distinct ones).

The product of its digits is 22500, while the sum is 33.

The square root of 6551556 is about 2559.6007501171. The cubic root of 6551556 is about 187.1176778442.

It can be divided in two parts, 655 and 1556, that added together give a triangular number (2211 = T₆₆).

The spelling of 6551556 in words is "six million, five hundred fifty-one thousand, five hundred fifty-six".