6666664176 has 140 divisors (see below), whose sum is σ = 19561333560. Its totient is φ = 2199830400.

The previous prime is 6666664157. The next prime is 6666664177. The reversal of 6666664176 is 6714666666.

It is a super-2 number, since 2×6666664176² = 88888822471123517952, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666664177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1175235 + ... + 1180893.

Almost surely, 2^6666664176 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6666664176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9780666780).

6666664176 is an abundant number, since it is smaller than the sum of its proper divisors (12894669384).

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

6666664176 is a wasteful number, since it uses less digits than its factorization.

6666664176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5786 (or 5765 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 54.

The square root of 6666664176 is about 81649.6428406150. The cubic root of 6666664176 is about 1882.0718233813.

The spelling of 6666664176 in words is "six billion, six hundred sixty-six million, six hundred sixty-four thousand, one hundred seventy-six".