6550861 has 4 divisors (see below), whose sum is σ = 6612192. Its totient is φ = 6489532.

The previous prime is 6550847. The next prime is 6550879. The reversal of 6550861 is 1680556.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6550861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6550811) 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, 30505 + ... + 30718.

It is an arithmetic number, because the mean of its divisors is an integer number (1653048).

Almost surely, 2^6550861 is an apocalyptic number.

It is an amenable number.

6550861 is a deficient number, since it is larger than the sum of its proper divisors (61331).

6550861 is a wasteful number, since it uses less digits than its factorization.

6550861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61330.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 6550861 is about 2559.4649831557. The cubic root of 6550861 is about 187.1110610250. Note that the first 3 decimals are identical.

The spelling of 6550861 in words is "six million, five hundred fifty thousand, eight hundred sixty-one".