655244661 has 4 divisors (see below), whose sum is σ = 873659552. Its totient is φ = 436829772.

The previous prime is 655244641. The next prime is 655244663. The reversal of 655244661 is 166442556.

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 not a de Polignac number, because 655244661 - 2⁷ = 655244533 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 (655244663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109207441 + ... + 109207446.

It is an arithmetic number, because the mean of its divisors is an integer number (218414888).

Almost surely, 2^655244661 is an apocalyptic number.

It is an amenable number.

655244661 is a deficient number, since it is larger than the sum of its proper divisors (218414891).

655244661 is a wasteful number, since it uses less digits than its factorization.

655244661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218414890.

The product of its digits is 172800, while the sum is 39.

The square root of 655244661 is about 25597.7471860318. The cubic root of 655244661 is about 868.5626775803.

The spelling of 655244661 in words is "six hundred fifty-five million, two hundred forty-four thousand, six hundred sixty-one".