966643 has 4 divisors (see below), whose sum is σ = 968688. Its totient is φ = 964600.

The previous prime is 966631. The next prime is 966653. The reversal of 966643 is 346669.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-966643 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 966599 and 966608.

It is not an unprimeable number, because it can be changed into a prime (966613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93 + ... + 1393.

It is an arithmetic number, because the mean of its divisors is an integer number (242172).

2⁹⁶⁶⁶⁴³ is an apocalyptic number.

966643 is a deficient number, since it is larger than the sum of its proper divisors (2045).

966643 is a wasteful number, since it uses less digits than its factorization.

966643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044.

The product of its digits is 23328, while the sum is 34.

The square root of 966643 is about 983.1800445493. The cubic root of 966643 is about 98.8755024500.

The spelling of 966643 in words is "nine hundred sixty-six thousand, six hundred forty-three".