666666576830 has 128 divisors (see below), whose sum is σ = 1375609910400. Its totient is φ = 231007666176.

The previous prime is 666666576827. The next prime is 666666576839. The reversal of 666666576830 is 38675666666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666666576839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 90465386 + ... + 90472754.

It is an arithmetic number, because the mean of its divisors is an integer number (10746952425).

Almost surely, 2^666666576830 is an apocalyptic number.

666666576830 is an abundant number, since it is smaller than the sum of its proper divisors (708943333570).

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

666666576830 is a wasteful number, since it uses less digits than its factorization.

666666576830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8206.

The product of its (nonzero) digits is 235146240, while the sum is 65.

The spelling of 666666576830 in words is "six hundred sixty-six billion, six hundred sixty-six million, five hundred seventy-six thousand, eight hundred thirty".