6400066600 has 48 divisors (see below), whose sum is σ = 14893243200. Its totient is φ = 2557775040.

The previous prime is 6400066553. The next prime is 6400066643. The reversal of 6400066600 is 66600046.

6400066600 is a modest number, since divided by 66600 gives 6400 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 223921 + ... + 250879.

It is an arithmetic number, because the mean of its divisors is an integer number (310275900).

Almost surely, 2^6400066600 is an apocalyptic number.

It is an amenable number.

6400066600 is an abundant number, since it is smaller than the sum of its proper divisors (8493176600).

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

6400066600 is a wasteful number, since it uses less digits than its factorization.

6400066600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28162 (or 28153 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 6400066600 is about 80000.4162489171. The cubic root of 6400066600 is about 1856.6419736273.

Adding to 6400066600 its reverse (66600046), we get a palindrome (6466666646).

The spelling of 6400066600 in words is "six billion, four hundred million, sixty-six thousand, six hundred".