5605850661 has 4 divisors (see below), whose sum is σ = 7474467552. Its totient is φ = 3737233772.

The previous prime is 5605850633. The next prime is 5605850681. The reversal of 5605850661 is 1660585065.

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 5605850661 - 2⁵ = 5605850629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5605850681) 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, 934308441 + ... + 934308446.

It is an arithmetic number, because the mean of its divisors is an integer number (1868616888).

Almost surely, 2^5605850661 is an apocalyptic number.

It is an amenable number.

5605850661 is a deficient number, since it is larger than the sum of its proper divisors (1868616891).

5605850661 is a wasteful number, since it uses less digits than its factorization.

5605850661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868616890.

The product of its (nonzero) digits is 216000, while the sum is 42.

The square root of 5605850661 is about 74872.2289036462. The cubic root of 5605850661 is about 1776.4262198242.

The spelling of 5605850661 in words is "five billion, six hundred five million, eight hundred fifty thousand, six hundred sixty-one".