2801661 has 8 divisors (see below), whose sum is σ = 3864480. Its totient is φ = 1803312.

The previous prime is 2801641. The next prime is 2801681. The reversal of 2801661 is 1661082.

It is an interprime number because it is at equal distance from previous prime (2801641) and next prime (2801681).

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

It is not a de Polignac number, because 2801661 - 2⁶ = 2801597 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2801611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16015 + ... + 16188.

It is an arithmetic number, because the mean of its divisors is an integer number (483060).

2^2801661 is an apocalyptic number.

It is an amenable number.

2801661 is a deficient number, since it is larger than the sum of its proper divisors (1062819).

2801661 is a wasteful number, since it uses less digits than its factorization.

2801661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32235.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 2801661 is about 1673.8162981642. The cubic root of 2801661 is about 140.9738395206.

The spelling of 2801661 in words is "two million, eight hundred one thousand, six hundred sixty-one".