100661320041 has 32 divisors (see below), whose sum is σ = 137522246400. Its totient is φ = 65475164160.

The previous prime is 100661320037. The next prime is 100661320043. The reversal of 100661320041 is 140023166001.

It is not a de Polignac number, because 100661320041 - 2² = 100661320037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100661319993 and 100661320020.

It is not an unprimeable number, because it can be changed into a prime (100661320043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23423805 + ... + 23428101.

It is an arithmetic number, because the mean of its divisors is an integer number (4297570200).

Almost surely, 2^100661320041 is an apocalyptic number.

It is an amenable number.

100661320041 is a deficient number, since it is larger than the sum of its proper divisors (36860926359).

100661320041 is a wasteful number, since it uses less digits than its factorization.

100661320041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5489.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 100661320041 its reverse (140023166001), we get a palindrome (240684486042).

The spelling of 100661320041 in words is "one hundred billion, six hundred sixty-one million, three hundred twenty thousand, forty-one".