2661616 has 10 divisors (see below), whose sum is σ = 5156912. Its totient is φ = 1330800.

The previous prime is 2661611. The next prime is 2661641. The reversal of 2661616 is 6161662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83160 + ... + 83191.

2^2661616 is an apocalyptic number.

It is an amenable number.

2661616 is a deficient number, since it is larger than the sum of its proper divisors (2495296).

2661616 is a wasteful number, since it uses less digits than its factorization.

2661616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166359 (or 166353 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 2661616 is about 1631.4459843954. The cubic root of 2661616 is about 138.5846511228.

The spelling of 2661616 in words is "two million, six hundred sixty-one thousand, six hundred sixteen".