2040604661 has 4 divisors (see below), whose sum is σ = 2053123872. Its totient is φ = 2028085452.

The previous prime is 2040604637. The next prime is 2040604669. The reversal of 2040604661 is 1664060402.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2040604661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2040604669) 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, 6259361 + ... + 6259686.

It is an arithmetic number, because the mean of its divisors is an integer number (513280968).

Almost surely, 2^2040604661 is an apocalyptic number.

It is an amenable number.

2040604661 is a deficient number, since it is larger than the sum of its proper divisors (12519211).

2040604661 is a wasteful number, since it uses less digits than its factorization.

2040604661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12519210.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 2040604661 is about 45173.0523763892. The cubic root of 2040604661 is about 1268.3904343308.

The spelling of 2040604661 in words is "two billion, forty million, six hundred four thousand, six hundred sixty-one".