11662661 has 2 divisors, whose sum is σ = 11662662. Its totient is φ = 11662660.

The previous prime is 11662657. The next prime is 11662687. The reversal of 11662661 is 16626611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8014561 + 3648100 = 2831^2 + 1910^2 .

It is an emirp because it is prime and its reverse (16626611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11662661 - 2² = 11662657 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11662621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5831330 + 5831331.

It is an arithmetic number, because the mean of its divisors is an integer number (5831331).

Almost surely, 2^11662661 is an apocalyptic number.

It is an amenable number.

11662661 is a deficient number, since it is larger than the sum of its proper divisors (1).

11662661 is an equidigital number, since it uses as much as digits as its factorization.

11662661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 29.

The square root of 11662661 is about 3415.0638354209. The cubic root of 11662661 is about 226.7771104891. Note that the first 3 decimals are identical.

The spelling of 11662661 in words is "eleven million, six hundred sixty-two thousand, six hundred sixty-one".