11669661 has 6 divisors (see below), whose sum is σ = 16856190. Its totient is φ = 7779768.

The previous prime is 11669657. The next prime is 11669663. The reversal of 11669661 is 16696611.

It can be written as a sum of positive squares in only one way, i.e., 7322436 + 4347225 = 2706^2 + 2085^2 .

It is not a de Polignac number, because 11669661 - 2² = 11669657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11669663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 648306 + ... + 648323.

It is an arithmetic number, because the mean of its divisors is an integer number (2809365).

Almost surely, 2^11669661 is an apocalyptic number.

It is an amenable number.

11669661 is a deficient number, since it is larger than the sum of its proper divisors (5186529).

11669661 is a wasteful number, since it uses less digits than its factorization.

11669661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296635 (or 1296632 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 11669661 is about 3416.0885527164. The cubic root of 11669661 is about 226.8224724147.

The spelling of 11669661 in words is "eleven million, six hundred sixty-nine thousand, six hundred sixty-one".