100560661 has 8 divisors (see below), whose sum is σ = 110148120. Its totient is φ = 91381248.

The previous prime is 100560653. The next prime is 100560667. The reversal of 100560661 is 166065001.

It can be written as a sum of positive squares in 4 ways, for example, as 60933636 + 39627025 = 7806^2 + 6295^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 100560661 - 2³ = 100560653 is a prime.

It is a super-2 number, since 2×100560661² = 20224893081513842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100560667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101496 + ... + 102481.

It is an arithmetic number, because the mean of its divisors is an integer number (13768515).

Almost surely, 2^100560661 is an apocalyptic number.

It is an amenable number.

100560661 is a deficient number, since it is larger than the sum of its proper divisors (9587459).

100560661 is a wasteful number, since it uses less digits than its factorization.

100560661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204023.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 100560661 is about 10027.9938671700. The cubic root of 100560661 is about 465.0247198482.

The spelling of 100560661 in words is "one hundred million, five hundred sixty thousand, six hundred sixty-one".