500440665666 has 8 divisors (see below), whose sum is σ = 1000881331344. Its totient is φ = 166813555220.

The previous prime is 500440665661. The next prime is 500440665667. The reversal of 500440665666 is 666566044005.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

500440665666 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (500440665661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41703388800 + ... + 41703388811.

It is an arithmetic number, because the mean of its divisors is an integer number (125110166418).

Almost surely, 2^500440665666 is an apocalyptic number.

500440665666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

500440665666 is a wasteful number, since it uses less digits than its factorization.

500440665666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83406777616.

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 500440665666 in words is "five hundred billion, four hundred forty million, six hundred sixty-five thousand, six hundred sixty-six".