2705661 has 24 divisors (see below), whose sum is σ = 4540224. Its totient is φ = 1520640.

The previous prime is 2705641. The next prime is 2705663. The reversal of 2705661 is 1665072.

It is not a de Polignac number, because 2705661 - 2⁵ = 2705629 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2705663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3901 + ... + 4541.

It is an arithmetic number, because the mean of its divisors is an integer number (189176).

2^2705661 is an apocalyptic number.

2705661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2705661 is a deficient number, since it is larger than the sum of its proper divisors (1834563).

2705661 is a wasteful number, since it uses less digits than its factorization.

2705661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721 (or 718 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 2705661 is about 1644.8893579813. The cubic root of 2705661 is about 139.3449157185.

The spelling of 2705661 in words is "two million, seven hundred five thousand, six hundred sixty-one".