666704040036 has 96 divisors (see below), whose sum is σ = 1714805043840. Its totient is φ = 200662984704.

The previous prime is 666704040017. The next prime is 666704040043. The reversal of 666704040036 is 630040407666.

It is a self number, because there is not a number n which added to its sum of digits gives 666704040036.

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 31 ways as a sum of consecutive naturals, for example, 569911 + ... + 1287713.

It is an arithmetic number, because the mean of its divisors is an integer number (17862552540).

Almost surely, 2^666704040036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666704040036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (857402521920).

666704040036 is an abundant number, since it is smaller than the sum of its proper divisors (1048101003804).

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

666704040036 is a wasteful number, since it uses less digits than its factorization.

666704040036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718013 (or 718011 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 42.

It can be divided in two parts, 6667040 and 40036, that added together give a palindrome (6707076).

The spelling of 666704040036 in words is "six hundred sixty-six billion, seven hundred four million, forty thousand, thirty-six".