6556724 has 12 divisors (see below), whose sum is σ = 11513124. Its totient is φ = 3267264.

The previous prime is 6556723. The next prime is 6556727. The reversal of 6556724 is 4276556.

It can be written as a sum of positive squares in 2 ways, for example, as 2280100 + 4276624 = 1510^2 + 2068^2 .

It is a super-2 number, since 2×6556724² = 85981259224352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6556723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1367 + ... + 3870.

It is an arithmetic number, because the mean of its divisors is an integer number (959427).

Almost surely, 2^6556724 is an apocalyptic number.

It is an amenable number.

6556724 is a deficient number, since it is larger than the sum of its proper divisors (4956400).

6556724 is a wasteful number, since it uses less digits than its factorization.

6556724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5554 (or 5552 counting only the distinct ones).

The product of its digits is 50400, while the sum is 35.

The square root of 6556724 is about 2560.6100835543. The cubic root of 6556724 is about 187.1668656504.

The spelling of 6556724 in words is "six million, five hundred fifty-six thousand, seven hundred twenty-four".