6620400224404 has 24 divisors (see below), whose sum is σ = 11595141818568. Its totient is φ = 3307503669120.

The previous prime is 6620400224369. The next prime is 6620400224407. The reversal of 6620400224404 is 4044220040266.

It can be written as a sum of positive squares in 4 ways, for example, as 710143290000 + 5910256934404 = 842700^2 + 2431102^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6620400224404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6620400224407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24216942 + ... + 24488794.

It is an arithmetic number, because the mean of its divisors is an integer number (483130909107).

Almost surely, 2^{6620400224404} is an apocalyptic number.

It is an amenable number.

6620400224404 is a deficient number, since it is larger than the sum of its proper divisors (4974741594164).

6620400224404 is a wasteful number, since it uses less digits than its factorization.

6620400224404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276795 (or 276793 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

The spelling of 6620400224404 in words is "six trillion, six hundred twenty billion, four hundred million, two hundred twenty-four thousand, four hundred four".