6644787902 has 16 divisors (see below), whose sum is σ = 10322629632. Its totient is φ = 3205902840.

The previous prime is 6644787887. The next prime is 6644787911. The reversal of 6644787902 is 2097874466.

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, 491138 + ... + 504485.

It is an arithmetic number, because the mean of its divisors is an integer number (645164352).

Almost surely, 2^6644787902 is an apocalyptic number.

6644787902 is a deficient number, since it is larger than the sum of its proper divisors (3677841730).

6644787902 is a wasteful number, since it uses less digits than its factorization.

6644787902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995743.

The product of its (nonzero) digits is 4064256, while the sum is 53.

The square root of 6644787902 is about 81515.5684639444. The cubic root of 6644787902 is about 1880.0109307875.

The spelling of 6644787902 in words is "six billion, six hundred forty-four million, seven hundred eighty-seven thousand, nine hundred two".