1966626 has 32 divisors (see below), whose sum is σ = 4435200. Its totient is φ = 645840.

The previous prime is 1966619. The next prime is 1966663. The reversal of 1966626 is 6266691.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4036 + ... + 4496.

It is an arithmetic number, because the mean of its divisors is an integer number (138600).

2^1966626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1966626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2217600).

1966626 is an abundant number, since it is smaller than the sum of its proper divisors (2468574).

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

1966626 is a wasteful number, since it uses less digits than its factorization.

1966626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551 (or 545 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 1966626 is about 1402.3644319506. The cubic root of 1966626 is about 125.2873602199.

The spelling of 1966626 in words is "one million, nine hundred sixty-six thousand, six hundred twenty-six".