6661950 has 48 divisors (see below), whose sum is σ = 17248896. Its totient is φ = 1698400.

The previous prime is 6661933. The next prime is 6661957. The reversal of 6661950 is 591666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661957) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2485 + ... + 4415.

It is an arithmetic number, because the mean of its divisors is an integer number (359352).

Almost surely, 2^6661950 is an apocalyptic number.

6661950 is the 1380-th nonagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6661950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8624448).

6661950 is an abundant number, since it is smaller than the sum of its proper divisors (10586946).

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

6661950 is a wasteful number, since it uses less digits than its factorization.

6661950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1969 (or 1964 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 6661950 is about 2581.0753572881. The cubic root of 6661950 is about 188.1628097718.

The spelling of 6661950 in words is "six million, six hundred sixty-one thousand, nine hundred fifty".