6660008040 has 64 divisors (see below), whose sum is σ = 22834316160. Its totient is φ = 1522287360.

The previous prime is 6660008027. The next prime is 6660008081. The reversal of 6660008040 is 408000666.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 6660007989 and 6660008007.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3963451 + ... + 3965130.

It is an arithmetic number, because the mean of its divisors is an integer number (356786190).

Almost surely, 2^6660008040 is an apocalyptic number.

6660008040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6660008040 is an abundant number, since it is smaller than the sum of its proper divisors (16174308120).

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

6660008040 is a wasteful number, since it uses less digits than its factorization.

6660008040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7928602 (or 7928598 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 6660008040 is about 81608.8723117775. The cubic root of 6660008040 is about 1881.4452482716.

The spelling of 6660008040 in words is "six billion, six hundred sixty million, eight thousand, forty".