2661604 has 24 divisors (see below), whose sum is σ = 5122656. Its totient is φ = 1200000.

The previous prime is 2661569. The next prime is 2661611. The reversal of 2661604 is 4061662.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10479 + ... + 10729.

It is an arithmetic number, because the mean of its divisors is an integer number (213444).

2^2661604 is an apocalyptic number.

It is an amenable number.

2661604 is a deficient number, since it is larger than the sum of its proper divisors (2461052).

2661604 is a wasteful number, since it uses less digits than its factorization.

2661604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507 (or 505 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 2661604 is about 1631.4423066722. The cubic root of 2661604 is about 138.5844428510.

The spelling of 2661604 in words is "two million, six hundred sixty-one thousand, six hundred four".