2661441605 has 8 divisors (see below), whose sum is σ = 3296753664. Its totient is φ = 2060470800.

The previous prime is 2661441593. The next prime is 2661441611. The reversal of 2661441605 is 5061441662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2661441605 - 2⁴ = 2661441589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8585141 + ... + 8585450.

It is an arithmetic number, because the mean of its divisors is an integer number (412094208).

Almost surely, 2^2661441605 is an apocalyptic number.

It is an amenable number.

2661441605 is a deficient number, since it is larger than the sum of its proper divisors (635312059).

2661441605 is a wasteful number, since it uses less digits than its factorization.

2661441605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17170627.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 2661441605 is about 51589.1617008844. The cubic root of 2661441605 is about 1385.8162426512.

The spelling of 2661441605 in words is "two billion, six hundred sixty-one million, four hundred forty-one thousand, six hundred five".