11661111010 has 32 divisors (see below), whose sum is σ = 21336307200. Its totient is φ = 4588097088.

The previous prime is 11661110999. The next prime is 11661111013. The reversal of 11661111010 is 1011116611.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11661111013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115479 + ... + 191461.

It is an arithmetic number, because the mean of its divisors is an integer number (666759600).

Almost surely, 2^11661111010 is an apocalyptic number.

11661111010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11661111010 is a deficient number, since it is larger than the sum of its proper divisors (9675196190).

11661111010 is a wasteful number, since it uses less digits than its factorization.

11661111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76242.

The product of its (nonzero) digits is 36, while the sum is 19.

Adding to 11661111010 its reverse (1011116611), we get a palindrome (12672227621).

The spelling of 11661111010 in words is "eleven billion, six hundred sixty-one million, one hundred eleven thousand, ten".