6618887 has 4 divisors (see below), whose sum is σ = 7220616. Its totient is φ = 6017160.

The previous prime is 6618853. The next prime is 6618901. The reversal of 6618887 is 7888166.

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

It is a cyclic number.

It is not a de Polignac number, because 6618887 - 2⁶ = 6618823 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 (6618827) 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, 300848 + ... + 300869.

It is an arithmetic number, because the mean of its divisors is an integer number (1805154).

Almost surely, 2^6618887 is an apocalyptic number.

6618887 is a deficient number, since it is larger than the sum of its proper divisors (601729).

6618887 is a wasteful number, since it uses less digits than its factorization.

6618887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601728.

The product of its digits is 129024, while the sum is 44.

The square root of 6618887 is about 2572.7197670947. The cubic root of 6618887 is about 187.7565034570.

The spelling of 6618887 in words is "six million, six hundred eighteen thousand, eight hundred eighty-seven".