786666 has 8 divisors (see below), whose sum is σ = 1573344. Its totient is φ = 262220.

The previous prime is 786661. The next prime is 786673. The reversal of 786666 is 666687.

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

786666 is an admirable number.

786666 is a modest number, since divided by 6666 gives 78 as remainder.

It is not an unprimeable number, because it can be changed into a prime (786661) by changing a digit.

786666 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 3 ways as a sum of consecutive naturals, for example, 65550 + ... + 65561.

It is an arithmetic number, because the mean of its divisors is an integer number (196668).

2⁷⁸⁶⁶⁶⁶ is an apocalyptic number.

786666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

786666 is a wasteful number, since it uses less digits than its factorization.

786666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131116.

The product of its digits is 72576, while the sum is 39.

The square root of 786666 is about 886.9419372202. The cubic root of 786666 is about 92.3131264963.

The spelling of 786666 in words is "seven hundred eighty-six thousand, six hundred sixty-six".