605056661 has 4 divisors (see below), whose sum is σ = 660061824. Its totient is φ = 550051500.

The previous prime is 605056651. The next prime is 605056679. The reversal of 605056661 is 166650506.

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 605056661 - 2¹⁸ = 604794517 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 (605056651) 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, 27502565 + ... + 27502586.

It is an arithmetic number, because the mean of its divisors is an integer number (165015456).

Almost surely, 2^605056661 is an apocalyptic number.

It is an amenable number.

605056661 is a deficient number, since it is larger than the sum of its proper divisors (55005163).

605056661 is a wasteful number, since it uses less digits than its factorization.

605056661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55005162.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 605056661 is about 24597.8995241464. The cubic root of 605056661 is about 845.7954583594.

The spelling of 605056661 in words is "six hundred five million, fifty-six thousand, six hundred sixty-one".