11661340 has 24 divisors (see below), whose sum is σ = 24745392. Its totient is φ = 4615680.

The previous prime is 11661323. The next prime is 11661347. The reversal of 11661340 is 4316611.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661347) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1066 + ... + 4945.

It is an arithmetic number, because the mean of its divisors is an integer number (1031058).

Almost surely, 2^11661340 is an apocalyptic number.

11661340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11661340 is an abundant number, since it is smaller than the sum of its proper divisors (13084052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11661340 is a wasteful number, since it uses less digits than its factorization.

11661340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6117 (or 6115 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 11661340 is about 3414.8704221390. The cubic root of 11661340 is about 226.7685480099.

Adding to 11661340 its reverse (4316611), we get a palindrome (15977951).

The spelling of 11661340 in words is "eleven million, six hundred sixty-one thousand, three hundred forty".