105665601 has 4 divisors (see below), whose sum is σ = 140887472. Its totient is φ = 70443732.

The previous prime is 105665597. The next prime is 105665629. The reversal of 105665601 is 106566501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 105665601 - 2² = 105665597 is a prime.

It is a super-2 number, since 2×105665601² = 22330438469382402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (105665641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17610931 + ... + 17610936.

It is an arithmetic number, because the mean of its divisors is an integer number (35221868).

Almost surely, 2^105665601 is an apocalyptic number.

It is an amenable number.

105665601 is a deficient number, since it is larger than the sum of its proper divisors (35221871).

105665601 is an equidigital number, since it uses as much as digits as its factorization.

105665601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35221870.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 105665601 is about 10279.3774616948. The cubic root of 105665601 is about 472.7641567632.

The spelling of 105665601 in words is "one hundred five million, six hundred sixty-five thousand, six hundred one".