11661115 has 16 divisors (see below), whose sum is σ = 15077376. Its totient is φ = 8632800.

The previous prime is 11661101. The next prime is 11661119. The reversal of 11661115 is 51116611.

It is not a de Polignac number, because 11661115 - 2⁹ = 11660603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11661119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1930 + ... + 5200.

It is an arithmetic number, because the mean of its divisors is an integer number (942336).

Almost surely, 2^11661115 is an apocalyptic number.

11661115 is a deficient number, since it is larger than the sum of its proper divisors (3416261).

11661115 is a wasteful number, since it uses less digits than its factorization.

11661115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3330.

The product of its digits is 180, while the sum is 22.

The square root of 11661115 is about 3414.8374778311. The cubic root of 11661115 is about 226.7670895369.

Adding to 11661115 its reverse (51116611), we get a palindrome (62777726).

The spelling of 11661115 in words is "eleven million, six hundred sixty-one thousand, one hundred fifteen".