6662844840 has 64 divisors (see below), whose sum is σ = 20453400000. Its totient is φ = 1735437312.

The previous prime is 6662844829. The next prime is 6662844857. The reversal of 6662844840 is 484482666.

It is a self number, because there is not a number n which added to its sum of digits gives 6662844840.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 640465 + ... + 650784.

It is an arithmetic number, because the mean of its divisors is an integer number (319584375).

Almost surely, 2^6662844840 is an apocalyptic number.

6662844840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6662844840 is an abundant number, since it is smaller than the sum of its proper divisors (13790555160).

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

6662844840 is a wasteful number, since it uses less digits than its factorization.

6662844840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291306 (or 1291302 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 48.

The square root of 6662844840 is about 81626.2509245647. The cubic root of 6662844840 is about 1881.7123413557.

The spelling of 6662844840 in words is "six billion, six hundred sixty-two million, eight hundred forty-four thousand, eight hundred forty".