271157661 has 12 divisors (see below), whose sum is σ = 394532892. Its totient is φ = 179451456.

The previous prime is 271157657. The next prime is 271157669. The reversal of 271157661 is 166751172.

271157661 is a `hidden beast` number, since 27 + 1 + 1 + 576 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 201100761 + 70056900 = 14181^2 + 8370^2 .

It is not a de Polignac number, because 271157661 - 2² = 271157657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (271157669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108726 + ... + 111191.

It is an arithmetic number, because the mean of its divisors is an integer number (32877741).

Almost surely, 2^271157661 is an apocalyptic number.

It is an amenable number.

271157661 is a deficient number, since it is larger than the sum of its proper divisors (123375231).

271157661 is a wasteful number, since it uses less digits than its factorization.

271157661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220060 (or 220057 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 271157661 is about 16466.8655487315. The cubic root of 271157661 is about 647.2528325214.

The spelling of 271157661 in words is "two hundred seventy-one million, one hundred fifty-seven thousand, six hundred sixty-one".