11661552 has 120 divisors (see below), whose sum is σ = 38997504. Its totient is φ = 3180672.

The previous prime is 11661547. The next prime is 11661563. The reversal of 11661552 is 25516611.

It is a happy number.

11661552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22933 + ... + 23435.

Almost surely, 2^11661552 is an apocalyptic number.

11661552 is a gapful number since it is divisible by the number (12) 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 11661552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19498752).

11661552 is an abundant number, since it is smaller than the sum of its proper divisors (27335952).

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

11661552 is a wasteful number, since it uses less digits than its factorization.

11661552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 538 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 11661552 is about 3414.9014627072. The cubic root of 11661552 is about 226.7699221985.

The spelling of 11661552 in words is "eleven million, six hundred sixty-one thousand, five hundred fifty-two".