6555690 has 48 divisors (see below), whose sum is σ = 17791488. Its totient is φ = 1671648.

The previous prime is 6555683. The next prime is 6555691. The reversal of 6555690 is 965556.

It is a super-2 number, since 2×6555690² = 85954142752200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6555691) 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 23 ways as a sum of consecutive naturals, for example, 487 + ... + 3653.

It is an arithmetic number, because the mean of its divisors is an integer number (370656).

Almost surely, 2^6555690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6555690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8895744).

6555690 is an abundant number, since it is smaller than the sum of its proper divisors (11235798).

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

6555690 is a wasteful number, since it uses less digits than its factorization.

6555690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3203 (or 3200 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The square root of 6555690 is about 2560.4081705853. The cubic root of 6555690 is about 187.1570263509.

It can be divided in two parts, 65 and 55690, that added together give a palindrome (55755).

The spelling of 6555690 in words is "six million, five hundred fifty-five thousand, six hundred ninety".