100520066506 has 4 divisors (see below), whose sum is σ = 150780099762. Its totient is φ = 50260033252.

The previous prime is 100520066503. The next prime is 100520066573. The reversal of 100520066506 is 605660025001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 57308050881 + 43212015625 = 239391^2 + 207875^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (100520066503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25130016625 + ... + 25130016628.

Almost surely, 2^100520066506 is an apocalyptic number.

100520066506 is a deficient number, since it is larger than the sum of its proper divisors (50260033256).

100520066506 is an equidigital number, since it uses as much as digits as its factorization.

100520066506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50260033255.

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 100520066506 in words is "one hundred billion, five hundred twenty million, sixty-six thousand, five hundred six".