106666601 has 4 divisors (see below), whose sum is σ = 106796100. Its totient is φ = 106537104.

The previous prime is 106666591. The next prime is 106666607.

106666601 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21381376 + 85285225 = 4624^2 + 9235^2 .

It is a cyclic number.

It is not a de Polignac number, because 106666601 - 2¹⁸ = 106404457 is a prime.

It is a super-2 number, since 2×106666601² = 22755527537786402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106666607) 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, 63506 + ... + 65163.

It is an arithmetic number, because the mean of its divisors is an integer number (26699025).

Almost surely, 2^106666601 is an apocalyptic number.

It is an amenable number.

106666601 is a deficient number, since it is larger than the sum of its proper divisors (129499).

106666601 is an equidigital number, since it uses as much as digits as its factorization.

106666601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129498.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 106666601 is about 10327.9524108121. The cubic root of 106666601 is about 474.2523432781.

The spelling of 106666601 in words is "one hundred six million, six hundred sixty-six thousand, six hundred one".