11660211660 has 96 divisors (see below), whose sum is σ = 33729841152. Its totient is φ = 3006581760.

The previous prime is 11660211611. The next prime is 11660211677. The reversal of 11660211660 is 6611206611.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3482107 + ... + 3485453.

It is an arithmetic number, because the mean of its divisors is an integer number (351352512).

Almost surely, 2^11660211660 is an apocalyptic number.

11660211660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11660211660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16864920576).

11660211660 is an abundant number, since it is smaller than the sum of its proper divisors (22069629492).

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

11660211660 is a wasteful number, since it uses less digits than its factorization.

11660211660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5263 (or 5261 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The spelling of 11660211660 in words is "eleven billion, six hundred sixty million, two hundred eleven thousand, six hundred sixty".