11661471 has 12 divisors (see below), whose sum is σ = 17236648. Its totient is φ = 7593264.

The previous prime is 11661467. The next prime is 11661491. The reversal of 11661471 is 17416611.

It is not a de Polignac number, because 11661471 - 2² = 11661467 is a prime.

It is a super-3 number, since 3×11661471³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661491) 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, 14680 + ... + 15453.

Almost surely, 2^11661471 is an apocalyptic number.

11661471 is a deficient number, since it is larger than the sum of its proper divisors (5575177).

11661471 is a wasteful number, since it uses less digits than its factorization.

11661471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30182 (or 30179 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 11661471 is about 3414.8896029008. The cubic root of 11661471 is about 226.7693971567.

The spelling of 11661471 in words is "eleven million, six hundred sixty-one thousand, four hundred seventy-one".