1966650 has 48 divisors (see below), whose sum is σ = 5577024. Its totient is φ = 449280.

The previous prime is 1966619. The next prime is 1966663. The reversal of 1966650 is 566691.

It is a Curzon 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, 114 + ... + 1986.

It is an arithmetic number, because the mean of its divisors is an integer number (116188).

2^1966650 is an apocalyptic number.

1966650 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 1966650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2788512).

1966650 is an abundant number, since it is smaller than the sum of its proper divisors (3610374).

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

1966650 is a wasteful number, since it uses less digits than its factorization.

1966650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895 (or 1890 counting only the distinct ones).

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

The square root of 1966650 is about 1402.3729889013. The cubic root of 1966650 is about 125.2878698719.

The spelling of 1966650 in words is "one million, nine hundred sixty-six thousand, six hundred fifty".