2665616 has 10 divisors (see below), whose sum is σ = 5164662. Its totient is φ = 1332800.

The previous prime is 2665601. The next prime is 2665627. The reversal of 2665616 is 6165662.

It can be written as a sum of positive squares in only one way, i.e., 2310400 + 355216 = 1520^2 + 596^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83285 + ... + 83316.

2^2665616 is an apocalyptic number.

It is an amenable number.

2665616 is a deficient number, since it is larger than the sum of its proper divisors (2499046).

2665616 is a wasteful number, since it uses less digits than its factorization.

2665616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166609 (or 166603 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 2665616 is about 1632.6714305089. The cubic root of 2665616 is about 138.6540401882.

It can be divided in two parts, 266561 and 6, that multiplied together give a triangular number (1599366 = T₁₇₈₈).

The spelling of 2665616 in words is "two million, six hundred sixty-five thousand, six hundred sixteen".