11661385 has 16 divisors (see below), whose sum is σ = 14534784. Its totient is φ = 8975232.

The previous prime is 11661379. The next prime is 11661407. The reversal of 11661385 is 58316611.

It is a cyclic number.

It is not a de Polignac number, because 11661385 - 2⁷ = 11661257 is a prime.

It is a Duffinian number.

Its product of digits (4320) is a multiple of the sum of its prime divisors (864).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15324 + ... + 16066.

It is an arithmetic number, because the mean of its divisors is an integer number (908424).

Almost surely, 2^11661385 is an apocalyptic number.

It is an amenable number.

11661385 is a deficient number, since it is larger than the sum of its proper divisors (2873399).

11661385 is an equidigital number, since it uses as much as digits as its factorization.

11661385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864.

The product of its digits is 4320, while the sum is 31.

The square root of 11661385 is about 3414.8770109625. The cubic root of 11661385 is about 226.7688397023.

Adding to 11661385 its reverse (58316611), we get a palindrome (69977996).

The spelling of 11661385 in words is "eleven million, six hundred sixty-one thousand, three hundred eighty-five".