275448661 has 4 divisors (see below), whose sum is σ = 276014752. Its totient is φ = 274882572.

The previous prime is 275448653. The next prime is 275448673. The reversal of 275448661 is 166844572.

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 275448661 - 2³ = 275448653 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 (275440661) 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, 282315 + ... + 283288.

It is an arithmetic number, because the mean of its divisors is an integer number (69003688).

Almost surely, 2^275448661 is an apocalyptic number.

It is an amenable number.

275448661 is a deficient number, since it is larger than the sum of its proper divisors (566091).

275448661 is an equidigital number, since it uses as much as digits as its factorization.

275448661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566090.

The product of its digits is 322560, while the sum is 43.

The square root of 275448661 is about 16596.6460768434. The cubic root of 275448661 is about 650.6491825817.

It can be divided in two parts, 2754 and 48661, that added together give a palindrome (51415).

The spelling of 275448661 in words is "two hundred seventy-five million, four hundred forty-eight thousand, six hundred sixty-one".