12661950 has 96 divisors (see below), whose sum is σ = 37140480. Its totient is φ = 2793600.

The previous prime is 12661949. The next prime is 12661973. The reversal of 12661950 is 5916621.

12661950 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32356 + ... + 32744.

It is an arithmetic number, because the mean of its divisors is an integer number (386880).

Almost surely, 2^12661950 is an apocalyptic number.

12661950 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 12661950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18570240).

12661950 is an abundant number, since it is smaller than the sum of its proper divisors (24478530).

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

12661950 is a wasteful number, since it uses less digits than its factorization.

12661950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 437 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 12661950 is about 3558.3633878512. The cubic root of 12661950 is about 233.0774178321.

The spelling of 12661950 in words is "twelve million, six hundred sixty-one thousand, nine hundred fifty".