6550385 has 4 divisors (see below), whose sum is σ = 7860468. Its totient is φ = 5240304.

The previous prime is 6550367. The next prime is 6550403. The reversal of 6550385 is 5830556.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6550367) and next prime (6550403).

It can be written as a sum of positive squares in 2 ways, for example, as 1784896 + 4765489 = 1336^2 + 2183^2 .

It is a cyclic number.

It is not a de Polignac number, because 6550385 - 2⁸ = 6550129 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 655034 + ... + 655043.

It is an arithmetic number, because the mean of its divisors is an integer number (1965117).

Almost surely, 2^6550385 is an apocalyptic number.

It is an amenable number.

6550385 is a deficient number, since it is larger than the sum of its proper divisors (1310083).

6550385 is a wasteful number, since it uses less digits than its factorization.

6550385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310082.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 6550385 is about 2559.3719932827. The cubic root of 6550385 is about 187.1065289478.

The spelling of 6550385 in words is "six million, five hundred fifty thousand, three hundred eighty-five".