2106669 has 8 divisors (see below), whose sum is σ = 2884960. Its totient is φ = 1366416.

The previous prime is 2106653. The next prime is 2106673. The reversal of 2106669 is 9666012.

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

It is not a de Polignac number, because 2106669 - 2⁴ = 2106653 is a prime.

It is a super-2 number, since 2×2106669² = 8876108551122, 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 (2106619) 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, 9379 + ... + 9600.

It is an arithmetic number, because the mean of its divisors is an integer number (360620).

2^2106669 is an apocalyptic number.

It is an amenable number.

2106669 is a deficient number, since it is larger than the sum of its proper divisors (778291).

2106669 is a wasteful number, since it uses less digits than its factorization.

2106669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19019.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 2106669 is about 1451.4368742732. The cubic root of 2106669 is about 128.1933317047.

It can be divided in two parts, 2106 and 669, that added together give a triangular number (2775 = T₇₄).

The spelling of 2106669 in words is "two million, one hundred six thousand, six hundred sixty-nine".