6604021400 has 24 divisors (see below), whose sum is σ = 15354350220. Its totient is φ = 2641608480.

The previous prime is 6604021393. The next prime is 6604021423. The reversal of 6604021400 is 41204066.

It is a happy number.

It is a super-2 number, since 2×6604021400² = 87226197303315920000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16509854 + ... + 16510253.

Almost surely, 2^6604021400 is an apocalyptic number.

It is an amenable number.

6604021400 is an abundant number, since it is smaller than the sum of its proper divisors (8750328820).

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

6604021400 is a wasteful number, since it uses less digits than its factorization.

6604021400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33020123 (or 33020114 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 6604021400 is about 81265.1302835355. The cubic root of 6604021400 is about 1876.1583503131.

Adding to 6604021400 its reverse (41204066), we get a palindrome (6645225466).

The spelling of 6604021400 in words is "six billion, six hundred four million, twenty-one thousand, four hundred".