6400400966 has 16 divisors (see below), whose sum is σ = 9834846720. Its totient is φ = 3122945280.

The previous prime is 6400400959. The next prime is 6400400977. The reversal of 6400400966 is 6690040046.

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, 191051 + ... + 222038.

It is an arithmetic number, because the mean of its divisors is an integer number (614677920).

Almost surely, 2^6400400966 is an apocalyptic number.

6400400966 is a deficient number, since it is larger than the sum of its proper divisors (3434445754).

6400400966 is a wasteful number, since it uses less digits than its factorization.

6400400966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413279.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 6400400966 is about 80002.5059982498. The cubic root of 6400400966 is about 1856.6743059543.

The spelling of 6400400966 in words is "six billion, four hundred million, four hundred thousand, nine hundred sixty-six".