9661950 has 96 divisors (see below), whose sum is σ = 28257120. Its totient is φ = 2419200.

The previous prime is 9661943. The next prime is 9661957. The reversal of 9661950 is 591669.

It is an interprime number because it is at equal distance from previous prime (9661943) and next prime (9661957).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9661957) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22740 + ... + 23160.

It is an arithmetic number, because the mean of its divisors is an integer number (294345).

Almost surely, 2^9661950 is an apocalyptic number.

9661950 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9661950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14128560).

9661950 is an abundant number, since it is smaller than the sum of its proper divisors (18595170).

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

9661950 is a wasteful number, since it uses less digits than its factorization.

9661950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 9661950 is about 3108.3677388623. The cubic root of 9661950 is about 212.9878985388.

It can be divided in two parts, 96619 and 50, that added together give a palindrome (96669).

The spelling of 9661950 in words is "nine million, six hundred sixty-one thousand, nine hundred fifty".