270661 has 4 divisors (see below), whose sum is σ = 279424. Its totient is φ = 261900.

The previous prime is 270659. The next prime is 270667. The reversal of 270661 is 166072.

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 270661 - 2¹ = 270659 is a prime.

It is a Duffinian number.

270661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (270667) 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, 4335 + ... + 4396.

It is an arithmetic number, because the mean of its divisors is an integer number (69856).

2²⁷⁰⁶⁶¹ is an apocalyptic number.

It is an amenable number.

270661 is a deficient number, since it is larger than the sum of its proper divisors (8763).

270661 is an equidigital number, since it uses as much as digits as its factorization.

270661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8762.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 270661 is about 520.2509010084. The cubic root of 270661 is about 64.6857414709.

The spelling of 270661 in words is "two hundred seventy thousand, six hundred sixty-one".