6655602687 has 4 divisors (see below), whose sum is σ = 8874136920. Its totient is φ = 4437068456.

The previous prime is 6655602671. The next prime is 6655602719. The reversal of 6655602687 is 7862065566.

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 6655602687 - 2⁴ = 6655602671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6655602607) 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, 1109267112 + ... + 1109267117.

It is an arithmetic number, because the mean of its divisors is an integer number (2218534230).

Almost surely, 2^6655602687 is an apocalyptic number.

6655602687 is a deficient number, since it is larger than the sum of its proper divisors (2218534233).

6655602687 is a wasteful number, since it uses less digits than its factorization.

6655602687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218534232.

The product of its (nonzero) digits is 3628800, while the sum is 51.

The square root of 6655602687 is about 81581.8771970834. The cubic root of 6655602687 is about 1881.0303209127.

The spelling of 6655602687 in words is "six billion, six hundred fifty-five million, six hundred two thousand, six hundred eighty-seven".