6557665 has 16 divisors (see below), whose sum is σ = 8398080. Its totient is φ = 4898560.

The previous prime is 6557659. The next prime is 6557671. The reversal of 6557665 is 5667556.

It is an interprime number because it is at equal distance from previous prime (6557659) and next prime (6557671).

It is not a de Polignac number, because 6557665 - 2³ = 6557657 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15000 + ... + 15430.

It is an arithmetic number, because the mean of its divisors is an integer number (524880).

Almost surely, 2^6557665 is an apocalyptic number.

It is an amenable number.

6557665 is a deficient number, since it is larger than the sum of its proper divisors (1840415).

6557665 is a wasteful number, since it uses less digits than its factorization.

6557665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632.

The product of its digits is 189000, while the sum is 40.

The square root of 6557665 is about 2560.7938222356. The cubic root of 6557665 is about 187.1758190849.

The spelling of 6557665 in words is "six million, five hundred fifty-seven thousand, six hundred sixty-five".