666446608044 has 72 divisors (see below), whose sum is σ = 1925446487328. Its totient is φ = 190397859840.

The previous prime is 666446607923. The next prime is 666446608103. The reversal of 666446608044 is 440806644666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3205714 + ... + 3407270.

It is an arithmetic number, because the mean of its divisors is an integer number (26742312324).

Almost surely, 2^666446608044 is an apocalyptic number.

It is an amenable number.

666446608044 is an abundant number, since it is smaller than the sum of its proper divisors (1258999879284).

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

666446608044 is a wasteful number, since it uses less digits than its factorization.

666446608044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214695 (or 214690 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 54.

The spelling of 666446608044 in words is "six hundred sixty-six billion, four hundred forty-six million, six hundred eight thousand, forty-four".