666008040 has 64 divisors (see below), whose sum is σ = 1999872000. Its totient is φ = 177437952.

The previous prime is 666008027. The next prime is 666008041. The reversal of 666008040 is 40800666.

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 = 666007989 and 666008007.

It is not an unprimeable number, because it can be changed into a prime (666008041) by changing a digit.

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, 184089 + ... + 187671.

It is an arithmetic number, because the mean of its divisors is an integer number (31248000).

Almost surely, 2^666008040 is an apocalyptic number.

666008040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

666008040 is an abundant number, since it is smaller than the sum of its proper divisors (1333863960).

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

666008040 is a wasteful number, since it uses less digits than its factorization.

666008040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5146 (or 5142 counting only the distinct ones).

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

The square root of 666008040 is about 25807.1315724937. The cubic root of 666008040 is about 873.2926882521.

The spelling of 666008040 in words is "six hundred sixty-six million, eight thousand, forty".