2616681 has 4 divisors (see below), whose sum is σ = 3488912. Its totient is φ = 1744452.

The previous prime is 2616673. The next prime is 2616683. The reversal of 2616681 is 1866162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2616681 - 2³ = 2616673 is a prime.

It is a super-2 number, since 2×2616681² = 13694038911522, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2616683) 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, 436111 + ... + 436116.

It is an arithmetic number, because the mean of its divisors is an integer number (872228).

2^2616681 is an apocalyptic number.

It is an amenable number.

2616681 is a deficient number, since it is larger than the sum of its proper divisors (872231).

2616681 is an equidigital number, since it uses as much as digits as its factorization.

2616681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872230.

The product of its digits is 3456, while the sum is 30.

The square root of 2616681 is about 1617.6158382014. The cubic root of 2616681 is about 137.8003308602.

The spelling of 2616681 in words is "two million, six hundred sixteen thousand, six hundred eighty-one".