11661671 has 16 divisors (see below), whose sum is σ = 13789440. Its totient is φ = 9654720.

The previous prime is 11661659. The next prime is 11661691. The reversal of 11661671 is 17616611.

It is a cyclic number.

It is not a de Polignac number, because 11661671 - 2⁶ = 11661607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51260 + ... + 51486.

It is an arithmetic number, because the mean of its divisors is an integer number (861840).

Almost surely, 2^11661671 is an apocalyptic number.

11661671 is a deficient number, since it is larger than the sum of its proper divisors (2127769).

11661671 is a wasteful number, since it uses less digits than its factorization.

With its successor (11661672) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (454).

11661671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454.

The product of its digits is 1512, while the sum is 29.

The square root of 11661671 is about 3414.9188862988. The cubic root of 11661671 is about 226.7706935518.

The spelling of 11661671 in words is "eleven million, six hundred sixty-one thousand, six hundred seventy-one".