105599661 has 8 divisors (see below), whose sum is σ = 141039360. Its totient is φ = 70279872.

The previous prime is 105599639. The next prime is 105599677. The reversal of 105599661 is 166995501.

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

It is not a de Polignac number, because 105599661 - 2⁵ = 105599629 is a prime.

It is a super-2 number, since 2×105599661² = 22302576806629842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105599761) 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, 27901 + ... + 31458.

It is an arithmetic number, because the mean of its divisors is an integer number (17629920).

Almost surely, 2^105599661 is an apocalyptic number.

It is an amenable number.

105599661 is a deficient number, since it is larger than the sum of its proper divisors (35439699).

105599661 is an equidigital number, since it uses as much as digits as its factorization.

105599661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59955.

The product of its (nonzero) digits is 72900, while the sum is 42.

The square root of 105599661 is about 10276.1695684725. The cubic root of 105599661 is about 472.6657943977.

The spelling of 105599661 in words is "one hundred five million, five hundred ninety-nine thousand, six hundred sixty-one".