11665427620 has 192 divisors, whose sum is σ = 31229743104. Its totient is φ = 3555002880.

The previous prime is 11665427603. The next prime is 11665427699. The reversal of 11665427620 is 2672456611.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17230722 + ... + 17231398.

It is an arithmetic number, because the mean of its divisors is an integer number (162654912).

Almost surely, 2^11665427620 is an apocalyptic number.

11665427620 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 11665427620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15614871552).

11665427620 is an abundant number, since it is smaller than the sum of its proper divisors (19564315484).

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

11665427620 is a wasteful number, since it uses less digits than its factorization.

11665427620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 11665427620 in words is "eleven billion, six hundred sixty-five million, four hundred twenty-seven thousand, six hundred twenty".