655050661 has 4 divisors (see below), whose sum is σ = 655533324. Its totient is φ = 654568000.

The previous prime is 655050623. The next prime is 655050667. The reversal of 655050661 is 166050556.

655050661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 133841761 + 521208900 = 11569^2 + 22830^2 .

It is a cyclic number.

It is not a de Polignac number, because 655050661 - 2¹⁵ = 655017893 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 (655050667) 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, 239290 + ... + 242011.

It is an arithmetic number, because the mean of its divisors is an integer number (163883331).

Almost surely, 2^655050661 is an apocalyptic number.

It is an amenable number.

655050661 is a deficient number, since it is larger than the sum of its proper divisors (482663).

655050661 is a wasteful number, since it uses less digits than its factorization.

655050661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482662.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 655050661 is about 25593.9575095373. The cubic root of 655050661 is about 868.4769499115.

The spelling of 655050661 in words is "six hundred fifty-five million, fifty thousand, six hundred sixty-one".