1963666 has 8 divisors (see below), whose sum is σ = 2957184. Its totient is φ = 977940.

The previous prime is 1963657. The next prime is 1963667. The reversal of 1963666 is 6663691.

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

It is not an unprimeable number, because it can be changed into a prime (1963667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1270 + ... + 2353.

It is an arithmetic number, because the mean of its divisors is an integer number (369648).

2^1963666 is an apocalyptic number.

1963666 is a deficient number, since it is larger than the sum of its proper divisors (993518).

1963666 is a wasteful number, since it uses less digits than its factorization.

1963666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3896.

The product of its digits is 34992, while the sum is 37.

The square root of 1963666 is about 1401.3086740615. The cubic root of 1963666 is about 125.2244713264.

The spelling of 1963666 in words is "one million, nine hundred sixty-three thousand, six hundred sixty-six".