11660021236 has 6 divisors (see below), whose sum is σ = 20405037170. Its totient is φ = 5830010616.

The previous prime is 11660021171. The next prime is 11660021239. The reversal of 11660021236 is 63212006611.

It can be written as a sum of positive squares in only one way, i.e., 11514577636 + 145443600 = 107306^2 + 12060^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11660021239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1457502651 + ... + 1457502658.

Almost surely, 2^11660021236 is an apocalyptic number.

It is an amenable number.

11660021236 is a deficient number, since it is larger than the sum of its proper divisors (8745015934).

11660021236 is a wasteful number, since it uses less digits than its factorization.

11660021236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2915005313 (or 2915005311 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

Adding to 11660021236 its reverse (63212006611), we get a palindrome (74872027847).

The spelling of 11660021236 in words is "eleven billion, six hundred sixty million, twenty-one thousand, two hundred thirty-six".