11665664530 has 16 divisors (see below), whose sum is σ = 22613442264. Its totient is φ = 4307322240.

The previous prime is 11665664509. The next prime is 11665664539. The reversal of 11665664530 is 3546656611.

It can be written as a sum of positive squares in 4 ways, for example, as 3169802601 + 8495861929 = 56301^2 + 92173^2 .

It is not an unprimeable number, because it can be changed into a prime (11665664539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44867811 + ... + 44868070.

Almost surely, 2^11665664530 is an apocalyptic number.

11665664530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11665664530 is a deficient number, since it is larger than the sum of its proper divisors (10947777734).

11665664530 is a wasteful number, since it uses less digits than its factorization.

11665664530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89735901.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 11665664530 in words is "eleven billion, six hundred sixty-five million, six hundred sixty-four thousand, five hundred thirty".