6665668005 has 16 divisors (see below), whose sum is σ = 10913094720. Its totient is φ = 3472347648.

The previous prime is 6665668003. The next prime is 6665668049. The reversal of 6665668005 is 5008665666.

It is not a de Polignac number, because 6665668005 - 2¹ = 6665668003 is a prime.

It is a super-2 number, since 2×6665668005² = 88862259905761360050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665668003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5166540 + ... + 5167829.

It is an arithmetic number, because the mean of its divisors is an integer number (682068420).

Almost surely, 2^6665668005 is an apocalyptic number.

It is an amenable number.

6665668005 is a deficient number, since it is larger than the sum of its proper divisors (4247426715).

6665668005 is a wasteful number, since it uses less digits than its factorization.

6665668005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10334420.

The product of its (nonzero) digits is 1555200, while the sum is 48.

The square root of 6665668005 is about 81643.5423349575. The cubic root of 6665668005 is about 1881.9780754082.

The spelling of 6665668005 in words is "six billion, six hundred sixty-five million, six hundred sixty-eight thousand, five".