6662664663 has 4 divisors (see below), whose sum is σ = 8883552888. Its totient is φ = 4441776440.

The previous prime is 6662664661. The next prime is 6662664707. The reversal of 6662664663 is 3664662666.

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 6662664663 - 2¹ = 6662664661 is a prime.

It is a super-2 number, since 2×6662664663² = 88782200823177807138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6662664661) 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, 1110444108 + ... + 1110444113.

It is an arithmetic number, because the mean of its divisors is an integer number (2220888222).

Almost surely, 2^6662664663 is an apocalyptic number.

6662664663 is a deficient number, since it is larger than the sum of its proper divisors (2220888225).

6662664663 is a wasteful number, since it uses less digits than its factorization.

6662664663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220888224.

The product of its digits is 6718464, while the sum is 51.

The square root of 6662664663 is about 81625.1472464216. The cubic root of 6662664663 is about 1881.6953794148.

The spelling of 6662664663 in words is "six billion, six hundred sixty-two million, six hundred sixty-four thousand, six hundred sixty-three".