4440011661 has 12 divisors (see below), whose sum is σ = 6421832092. Its totient is φ = 2956093056.

The previous prime is 4440011657. The next prime is 4440011663. The reversal of 4440011661 is 1661100444.

It can be written as a sum of positive squares in 2 ways, for example, as 1870130025 + 2569881636 = 43245^2 + 50694^2 .

It is not a de Polignac number, because 4440011661 - 2² = 4440011657 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 (4440011663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319036 + ... + 332661.

Almost surely, 2^4440011661 is an apocalyptic number.

It is an amenable number.

4440011661 is a deficient number, since it is larger than the sum of its proper divisors (1981820431).

4440011661 is a wasteful number, since it uses less digits than its factorization.

4440011661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652460 (or 652457 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 4440011661 is about 66633.4124970348. The cubic root of 4440011661 is about 1643.5945918585.

The spelling of 4440011661 in words is "four billion, four hundred forty million, eleven thousand, six hundred sixty-one".