10661550 has 96 divisors (see below), whose sum is σ = 29007072. Its totient is φ = 2580480.

The previous prime is 10661543. The next prime is 10661569. The reversal of 10661550 is 5516601.

It is a super-2 number, since 2×10661550² = 227337296805000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10661550.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 94294 + ... + 94406.

It is an arithmetic number, because the mean of its divisors is an integer number (302157).

Almost surely, 2^10661550 is an apocalyptic number.

10661550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 10661550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14503536).

10661550 is an abundant number, since it is smaller than the sum of its proper divisors (18345522).

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

10661550 is a wasteful number, since it uses less digits than its factorization.

10661550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 10661550 is about 3265.2029033431. The cubic root of 10661550 is about 220.0932800029.

It can be divided in two parts, 10661 and 550, that added together give a palindrome (11211).

The spelling of 10661550 in words is "ten million, six hundred sixty-one thousand, five hundred fifty".