271216661 has 4 divisors (see below), whose sum is σ = 273168000. Its totient is φ = 269265324.

The previous prime is 271216651. The next prime is 271216669. The reversal of 271216661 is 166612172.

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 271216661 - 2¹⁴ = 271200277 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 (271216669) 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, 975461 + ... + 975738.

It is an arithmetic number, because the mean of its divisors is an integer number (68292000).

Almost surely, 2^271216661 is an apocalyptic number.

It is an amenable number.

271216661 is a deficient number, since it is larger than the sum of its proper divisors (1951339).

271216661 is a wasteful number, since it uses less digits than its factorization.

271216661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1951338.

The product of its digits is 6048, while the sum is 32.

The square root of 271216661 is about 16468.6569276307. The cubic root of 271216661 is about 647.2997734137.

The spelling of 271216661 in words is "two hundred seventy-one million, two hundred sixteen thousand, six hundred sixty-one".