666038604628 has 12 divisors (see below), whose sum is σ = 1166987256372. Its totient is φ = 332613674240.

The previous prime is 666038604613. The next prime is 666038604629. The reversal of 666038604628 is 826406830666.

It can be written as a sum of positive squares in 2 ways, for example, as 87605344324 + 578433260304 = 295982^2 + 760548^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666038604629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101403325 + ... + 101409892.

It is an arithmetic number, because the mean of its divisors is an integer number (97248938031).

Almost surely, 2^666038604628 is an apocalyptic number.

It is an amenable number.

666038604628 is a deficient number, since it is larger than the sum of its proper divisors (500948651744).

666038604628 is a wasteful number, since it uses less digits than its factorization.

666038604628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202814042 (or 202814040 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 55.

The spelling of 666038604628 in words is "six hundred sixty-six billion, thirty-eight million, six hundred four thousand, six hundred twenty-eight".