666110244840 has 64 divisors (see below), whose sum is σ = 1998385214400. Its totient is φ = 177624556032.

The previous prime is 666110244769. The next prime is 666110244893. The reversal of 666110244840 is 48442011666.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 666110244792 and 666110244801.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7450644 + ... + 7539516.

It is an arithmetic number, because the mean of its divisors is an integer number (31224768975).

Almost surely, 2^666110244840 is an apocalyptic number.

666110244840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

666110244840 is an abundant number, since it is smaller than the sum of its proper divisors (1332274969560).

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

666110244840 is a wasteful number, since it uses less digits than its factorization.

666110244840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151346 (or 151342 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 42.

The spelling of 666110244840 in words is "six hundred sixty-six billion, one hundred ten million, two hundred forty-four thousand, eight hundred forty".