966691 has 4 divisors (see below), whose sum is σ = 1054584. Its totient is φ = 878800.

The previous prime is 966677. The next prime is 966727. The reversal of 966691 is 196669.

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

It is a cyclic number.

It is not a de Polignac number, because 966691 - 2⁵ = 966659 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 966691.

It is not an unprimeable number, because it can be changed into a prime (966631) 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, 43930 + ... + 43951.

It is an arithmetic number, because the mean of its divisors is an integer number (263646).

2⁹⁶⁶⁶⁹¹ is an apocalyptic number.

966691 is a deficient number, since it is larger than the sum of its proper divisors (87893).

966691 is a wasteful number, since it uses less digits than its factorization.

966691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87892.

The product of its digits is 17496, while the sum is 37.

The square root of 966691 is about 983.2044548312. The cubic root of 966691 is about 98.8771390230.

The spelling of 966691 in words is "nine hundred sixty-six thousand, six hundred ninety-one".