7866038640404 has 24 divisors (see below), whose sum is σ = 15761156936448. Its totient is φ = 3364928062560.

The previous prime is 7866038640379. The next prime is 7866038640461. The reversal of 7866038640404 is 4040468306687.

It is a self number, because there is not a number n which added to its sum of digits gives 7866038640404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259624364 + ... + 259654659.

It is an arithmetic number, because the mean of its divisors is an integer number (656714872352).

Almost surely, 2^{7866038640404} is an apocalyptic number.

It is an amenable number.

7866038640404 is an abundant number, since it is smaller than the sum of its proper divisors (7895118296044).

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

7866038640404 is a wasteful number, since it uses less digits than its factorization.

7866038640404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519279575 (or 519279573 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 56.

The spelling of 7866038640404 in words is "seven trillion, eight hundred sixty-six billion, thirty-eight million, six hundred forty thousand, four hundred four".