10991668 has 12 divisors (see below), whose sum is σ = 19337472. Its totient is φ = 5466680.

The previous prime is 10991663. The next prime is 10991681. The reversal of 10991668 is 86619901.

10991668 is nontrivially palindromic in base 11.

10991668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×10991668³ (a number of 22 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10991668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10991663) 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, 6430 + ... + 7957.

It is an arithmetic number, because the mean of its divisors is an integer number (1611456).

Almost surely, 2^10991668 is an apocalyptic number.

It is an amenable number.

10991668 is a deficient number, since it is larger than the sum of its proper divisors (8345804).

10991668 is a wasteful number, since it uses less digits than its factorization.

10991668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14582 (or 14580 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 10991668 is about 3315.3684561448. The cubic root of 10991668 is about 222.3418427458.

The spelling of 10991668 in words is "ten million, nine hundred ninety-one thousand, six hundred sixty-eight".