4459916661 has 4 divisors (see below), whose sum is σ = 5946555552. Its totient is φ = 2973277772.

The previous prime is 4459916651. The next prime is 4459916689. The reversal of 4459916661 is 1666199544.

It is a happy number.

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 not a de Polignac number, because 4459916661 - 2⁷ = 4459916533 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4459916611) 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, 743319441 + ... + 743319446.

It is an arithmetic number, because the mean of its divisors is an integer number (1486638888).

Almost surely, 2^4459916661 is an apocalyptic number.

It is an amenable number.

4459916661 is a deficient number, since it is larger than the sum of its proper divisors (1486638891).

4459916661 is a wasteful number, since it uses less digits than its factorization.

4459916661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486638890.

The product of its digits is 1399680, while the sum is 51.

The square root of 4459916661 is about 66782.6074738026. The cubic root of 4459916661 is about 1646.0470615785.

The spelling of 4459916661 in words is "four billion, four hundred fifty-nine million, nine hundred sixteen thousand, six hundred sixty-one".