6553881 has 6 divisors (see below), whose sum is σ = 9466730. Its totient is φ = 4369248.

The previous prime is 6553817. The next prime is 6553889. The reversal of 6553881 is 1883556.

It can be written as a sum of positive squares in only one way, i.e., 5760000 + 793881 = 2400^2 + 891^2 .

It is not a de Polignac number, because 6553881 - 2⁶ = 6553817 is a prime.

It is a super-2 number, since 2×6553881² = 85906712324322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6553889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 364096 + ... + 364113.

Almost surely, 2^6553881 is an apocalyptic number.

It is an amenable number.

6553881 is a deficient number, since it is larger than the sum of its proper divisors (2912849).

6553881 is a wasteful number, since it uses less digits than its factorization.

6553881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728215 (or 728212 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 6553881 is about 2560.0548822242. The cubic root of 6553881 is about 187.1398098460.

The spelling of 6553881 in words is "six million, five hundred fifty-three thousand, eight hundred eighty-one".