6655861 has 4 divisors (see below), whose sum is σ = 6663712. Its totient is φ = 6648012.

The previous prime is 6655837. The next prime is 6655879. The reversal of 6655861 is 1685566.

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 not a de Polignac number, because 6655861 - 2¹¹ = 6653813 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6655861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6655801) 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, 2475 + ... + 4408.

It is an arithmetic number, because the mean of its divisors is an integer number (1665928).

Almost surely, 2^6655861 is an apocalyptic number.

It is an amenable number.

6655861 is a deficient number, since it is larger than the sum of its proper divisors (7851).

6655861 is an equidigital number, since it uses as much as digits as its factorization.

6655861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7850.

The product of its digits is 43200, while the sum is 37.

The square root of 6655861 is about 2579.8955405210. The cubic root of 6655861 is about 188.1054655714.

The spelling of 6655861 in words is "six million, six hundred fifty-five thousand, eight hundred sixty-one".