6666633666 has 96 divisors (see below), whose sum is σ = 18610381440. Its totient is φ = 1731581280.

The previous prime is 6666633647. The next prime is 6666633689. The reversal of 6666633666 is 6663366666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27141 + ... + 118616.

It is an arithmetic number, because the mean of its divisors is an integer number (193858140).

Almost surely, 2^6666633666 is an apocalyptic number.

6666633666 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6666633666 is an abundant number, since it is smaller than the sum of its proper divisors (11943747774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6666633666 is a wasteful number, since it uses less digits than its factorization.

6666633666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145797 (or 145780 counting only the distinct ones).

The product of its digits is 15116544, while the sum is 54.

The square root of 6666633666 is about 81649.4560055363. The cubic root of 6666633666 is about 1882.0689522753.

The spelling of 6666633666 in words is "six billion, six hundred sixty-six million, six hundred thirty-three thousand, six hundred sixty-six".