666915222888 has 48 divisors (see below), whose sum is σ = 1806332654880. Its totient is φ = 222292283424.

The previous prime is 666915222881. The next prime is 666915222923. The reversal of 666915222888 is 888222519666.

It is not an unprimeable number, because it can be changed into a prime (666915222881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1037581 + ... + 1552547.

It is an arithmetic number, because the mean of its divisors is an integer number (37631930310).

Almost surely, 2^666915222888 is an apocalyptic number.

It is an amenable number.

666915222888 is an abundant number, since it is smaller than the sum of its proper divisors (1139417431992).

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

666915222888 is a wasteful number, since it uses less digits than its factorization.

666915222888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532966 (or 532959 counting only the distinct ones).

The product of its digits is 39813120, while the sum is 63.

The spelling of 666915222888 in words is "six hundred sixty-six billion, nine hundred fifteen million, two hundred twenty-two thousand, eight hundred eighty-eight".