2005092661 has 16 divisors (see below), whose sum is σ = 2400088320. Its totient is φ = 1650841920.

The previous prime is 2005092619. The next prime is 2005092671. The reversal of 2005092661 is 1662905002.

It is a de Polignac number, because none of the positive numbers 2^k-2005092661 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 (2005092671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124701 + ... + 139858.

It is an arithmetic number, because the mean of its divisors is an integer number (150005520).

Almost surely, 2^2005092661 is an apocalyptic number.

It is an amenable number.

2005092661 is a deficient number, since it is larger than the sum of its proper divisors (394995659).

2005092661 is a wasteful number, since it uses less digits than its factorization.

2005092661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264636.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 2005092661 is about 44778.2610314425. The cubic root of 2005092661 is about 1260.9895353007.

Adding to 2005092661 its reverse (1662905002), we get a palindrome (3667997663).

The spelling of 2005092661 in words is "two billion, five million, ninety-two thousand, six hundred sixty-one".