2100668 has 6 divisors (see below), whose sum is σ = 3676176. Its totient is φ = 1050332.

The previous prime is 2100661. The next prime is 2100691. The reversal of 2100668 is 8660012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262580 + ... + 262587.

It is an arithmetic number, because the mean of its divisors is an integer number (612696).

2^2100668 is an apocalyptic number.

It is an amenable number.

2100668 is a deficient number, since it is larger than the sum of its proper divisors (1575508).

2100668 is a wasteful number, since it uses less digits than its factorization.

2100668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525171 (or 525169 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 2100668 is about 1449.3681381899. The cubic root of 2100668 is about 128.0714932638.

The spelling of 2100668 in words is "two million, one hundred thousand, six hundred sixty-eight".