100521665066 has 8 divisors (see below), whose sum is σ = 150827801220. Its totient is φ = 50245731328.

The previous prime is 100521665021. The next prime is 100521665081. The reversal of 100521665066 is 660566125001.

It can be written as a sum of positive squares in 2 ways, for example, as 82033552225 + 18488112841 = 286415^2 + 135971^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 7542281 + ... + 7555596.

Almost surely, 2^100521665066 is an apocalyptic number.

100521665066 is a deficient number, since it is larger than the sum of its proper divisors (50306136154).

100521665066 is a wasteful number, since it uses less digits than its factorization.

100521665066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15101208.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 100521665066 in words is "one hundred billion, five hundred twenty-one million, six hundred sixty-five thousand, sixty-six".