6557445 has 12 divisors (see below), whose sum is σ = 11366316. Its totient is φ = 3497280.

The previous prime is 6557429. The next prime is 6557459. The reversal of 6557445 is 5447556.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3381921 + 3175524 = 1839^2 + 1782^2 .

It is not a de Polignac number, because 6557445 - 2⁴ = 6557429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72816 + ... + 72905.

It is an arithmetic number, because the mean of its divisors is an integer number (947193).

Almost surely, 2^6557445 is an apocalyptic number.

It is an amenable number.

6557445 is a deficient number, since it is larger than the sum of its proper divisors (4808871).

6557445 is a wasteful number, since it uses less digits than its factorization.

6557445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145732 (or 145729 counting only the distinct ones).

The product of its digits is 84000, while the sum is 36.

The square root of 6557445 is about 2560.7508664452. The cubic root of 6557445 is about 187.1737259038.

It can be divided in two parts, 655 and 7445, that added together give a square (8100 = 90²).

The spelling of 6557445 in words is "six million, five hundred fifty-seven thousand, four hundred forty-five".