100660045 has 4 divisors (see below), whose sum is σ = 120792060. Its totient is φ = 80528032.

The previous prime is 100660039. The next prime is 100660067. The reversal of 100660045 is 540066001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540066001 = 61 ⋅8853541.

It can be written as a sum of positive squares in 2 ways, for example, as 73599241 + 27060804 = 8579^2 + 5202^2 .

It is a cyclic number.

It is not a de Polignac number, because 100660045 - 2⁵ = 100660013 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 100659998 and 100660025.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10066000 + ... + 10066009.

It is an arithmetic number, because the mean of its divisors is an integer number (30198015).

Almost surely, 2^100660045 is an apocalyptic number.

It is an amenable number.

100660045 is a deficient number, since it is larger than the sum of its proper divisors (20132015).

100660045 is an equidigital number, since it uses as much as digits as its factorization.

100660045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20132014.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 100660045 is about 10032.9479715585. The cubic root of 100660045 is about 465.1778638960.

The spelling of 100660045 in words is "one hundred million, six hundred sixty thousand, forty-five".