11671664 has 20 divisors (see below), whose sum is σ = 22680840. Its totient is φ = 5818560.

The previous prime is 11671663. The next prime is 11671711. The reversal of 11671664 is 46617611.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11671664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11671663) 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, 5834 + ... + 7574.

It is an arithmetic number, because the mean of its divisors is an integer number (1134042).

Almost surely, 2^11671664 is an apocalyptic number.

It is an amenable number.

11671664 is a deficient number, since it is larger than the sum of its proper divisors (11009176).

11671664 is a wasteful number, since it uses less digits than its factorization.

11671664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168 (or 2162 counting only the distinct ones).

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

The square root of 11671664 is about 3416.3817116944. The cubic root of 11671664 is about 226.8354490676.

Adding to 11671664 its sum of digits (32), we get a triangular number (11671696 = T₄₈₃₁).

It can be divided in two parts, 1167166 and 4, that multiplied together give a palindrome (4668664).

The spelling of 11671664 in words is "eleven million, six hundred seventy-one thousand, six hundred sixty-four".