11665501 has 2 divisors, whose sum is σ = 11665502. Its totient is φ = 11665500.

The previous prime is 11665483. The next prime is 11665523. The reversal of 11665501 is 10556611.

11665501 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6625476 + 5040025 = 2574^2 + 2245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11665501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11665561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5832750 + 5832751.

It is an arithmetic number, because the mean of its divisors is an integer number (5832751).

Almost surely, 2^11665501 is an apocalyptic number.

It is an amenable number.

11665501 is a deficient number, since it is larger than the sum of its proper divisors (1).

11665501 is an equidigital number, since it uses as much as digits as its factorization.

11665501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 11665501 is about 3415.4796149297. The cubic root of 11665501 is about 226.7955166579.

The spelling of 11665501 in words is "eleven million, six hundred sixty-five thousand, five hundred one".