255574661 has 4 divisors (see below), whose sum is σ = 255669024. Its totient is φ = 255480300.

The previous prime is 255574619. The next prime is 255574663. The reversal of 255574661 is 166475552.

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 255574661 - 2¹⁸ = 255312517 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 (255574663) 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, 42995 + ... + 48576.

It is an arithmetic number, because the mean of its divisors is an integer number (63917256).

Almost surely, 2^255574661 is an apocalyptic number.

It is an amenable number.

255574661 is a deficient number, since it is larger than the sum of its proper divisors (94363).

255574661 is an equidigital number, since it uses as much as digits as its factorization.

255574661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94362.

The product of its digits is 252000, while the sum is 41.

The square root of 255574661 is about 15986.7026306240. The cubic root of 255574661 is about 634.6085677371.

The spelling of 255574661 in words is "two hundred fifty-five million, five hundred seventy-four thousand, six hundred sixty-one".