6666578630 has 16 divisors (see below), whose sum is σ = 12007596384. Its totient is φ = 2664908160.

The previous prime is 6666578617. The next prime is 6666578647. The reversal of 6666578630 is 368756666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199106 + ... + 230165.

It is an arithmetic number, because the mean of its divisors is an integer number (750474774).

Almost surely, 2^6666578630 is an apocalyptic number.

6666578630 is a deficient number, since it is larger than the sum of its proper divisors (5341017754).

6666578630 is a wasteful number, since it uses less digits than its factorization.

6666578630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430831.

The product of its (nonzero) digits is 6531840, while the sum is 53.

The square root of 6666578630 is about 81649.1189787128. The cubic root of 6666578630 is about 1882.0637731581.

The spelling of 6666578630 in words is "six billion, six hundred sixty-six million, five hundred seventy-eight thousand, six hundred thirty".