106665644140 has 96 divisors (see below), whose sum is σ = 253101542400. Its totient is φ = 37403493120.

The previous prime is 106665644093. The next prime is 106665644159. The reversal of 106665644140 is 41446566601.

It is a happy number.

It is a super-2 number, since 2×106665644140² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5342857 + ... + 5362783.

It is an arithmetic number, because the mean of its divisors is an integer number (2636474400).

Almost surely, 2^106665644140 is an apocalyptic number.

106665644140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 106665644140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126550771200).

106665644140 is an abundant number, since it is smaller than the sum of its proper divisors (146435898260).

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

106665644140 is a wasteful number, since it uses less digits than its factorization.

106665644140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20815 (or 20813 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 106665644140 in words is "one hundred six billion, six hundred sixty-five million, six hundred forty-four thousand, one hundred forty".