6440009662 has 16 divisors (see below), whose sum is σ = 9693077760. Its totient is φ = 3209003352.

The previous prime is 6440009647. The next prime is 6440009731. The reversal of 6440009662 is 2669000446.

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, 747793 + ... + 756355.

It is an arithmetic number, because the mean of its divisors is an integer number (605817360).

Almost surely, 2^6440009662 is an apocalyptic number.

6440009662 is a deficient number, since it is larger than the sum of its proper divisors (3253068098).

6440009662 is a wasteful number, since it uses less digits than its factorization.

6440009662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9807.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 6440009662 is about 80249.6707906020. The cubic root of 6440009662 is about 1860.4964241299.

The spelling of 6440009662 in words is "six billion, four hundred forty million, nine thousand, six hundred sixty-two".