6465556 has 12 divisors (see below), whose sum is σ = 11343892. Its totient is φ = 3224448.

The previous prime is 6465551. The next prime is 6465581. The reversal of 6465556 is 6555646.

It can be written as a sum of positive squares in 2 ways, for example, as 1988100 + 4477456 = 1410^2 + 2116^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6465551) 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, 135 + ... + 3598.

Almost surely, 2^6465556 is an apocalyptic number.

It is an amenable number.

6465556 is a deficient number, since it is larger than the sum of its proper divisors (4878336).

6465556 is a wasteful number, since it uses less digits than its factorization.

6465556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4170 (or 4168 counting only the distinct ones).

The product of its digits is 108000, while the sum is 37.

The square root of 6465556 is about 2542.7457600004. The cubic root of 6465556 is about 186.2953261154.

It can be divided in two parts, 6465 and 556, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 6465556 in words is "six million, four hundred sixty-five thousand, five hundred fifty-six".