100665043344 has 120 divisors (see below), whose sum is σ = 299607803040. Its totient is φ = 31461156864.

The previous prime is 100665043343. The next prime is 100665043357. The reversal of 100665043344 is 443340566001.

100665043344 is a `hidden beast` number, since 100 + 6 + 6 + 504 + 3 + 3 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 100665043299 and 100665043308.

It is not an unprimeable number, because it can be changed into a prime (100665043343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75739 + ... + 455045.

It is an arithmetic number, because the mean of its divisors is an integer number (2496731692).

Almost surely, 2^100665043344 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 100665043344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149803901520).

100665043344 is an abundant number, since it is smaller than the sum of its proper divisors (198942759696).

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

100665043344 is a wasteful number, since it uses less digits than its factorization.

100665043344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379437 (or 379428 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The spelling of 100665043344 in words is "one hundred billion, six hundred sixty-five million, forty-three thousand, three hundred forty-four".