1966646 has 8 divisors (see below), whose sum is σ = 3218184. Its totient is φ = 893920.

The previous prime is 1966619. The next prime is 1966663. The reversal of 1966646 is 6466691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44675 + ... + 44718.

It is an arithmetic number, because the mean of its divisors is an integer number (402273).

2^1966646 is an apocalyptic number.

1966646 is a deficient number, since it is larger than the sum of its proper divisors (1251538).

1966646 is a wasteful number, since it uses less digits than its factorization.

1966646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89406.

The product of its digits is 46656, while the sum is 38.

The square root of 1966646 is about 1402.3715627465. The cubic root of 1966646 is about 125.2877849302.

The spelling of 1966646 in words is "one million, nine hundred sixty-six thousand, six hundred forty-six".