6666621700 has 36 divisors (see below), whose sum is σ = 14477823360. Its totient is φ = 2664574240.

The previous prime is 6666621697. The next prime is 6666621707. The reversal of 6666621700 is 71266666.

It is not an unprimeable number, because it can be changed into a prime (6666621707) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106629 + ... + 157171.

It is an arithmetic number, because the mean of its divisors is an integer number (402161760).

Almost surely, 2^6666621700 is an apocalyptic number.

It is an amenable number.

6666621700 is an abundant number, since it is smaller than the sum of its proper divisors (7811201660).

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

6666621700 is a wasteful number, since it uses less digits than its factorization.

6666621700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51876 (or 51869 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 6666621700 is about 81649.3827288364. The cubic root of 6666621700 is about 1882.0678262272.

The spelling of 6666621700 in words is "six billion, six hundred sixty-six million, six hundred twenty-one thousand, seven hundred".