6655366563 has 4 divisors (see below), whose sum is σ = 8873822088. Its totient is φ = 4436911040.

The previous prime is 6655366559. The next prime is 6655366573. The reversal of 6655366563 is 3656635566.

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 6655366563 - 2² = 6655366559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6655366573) 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, 1109227758 + ... + 1109227763.

It is an arithmetic number, because the mean of its divisors is an integer number (2218455522).

Almost surely, 2^6655366563 is an apocalyptic number.

6655366563 is a deficient number, since it is larger than the sum of its proper divisors (2218455525).

6655366563 is a wasteful number, since it uses less digits than its factorization.

6655366563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218455524.

The product of its digits is 8748000, while the sum is 51.

The square root of 6655366563 is about 81580.4300246082. The cubic root of 6655366563 is about 1881.0080759121.

The spelling of 6655366563 in words is "six billion, six hundred fifty-five million, three hundred sixty-six thousand, five hundred sixty-three".