766667 has 4 divisors (see below), whose sum is σ = 836376. Its totient is φ = 696960.

The previous prime is 766651. The next prime is 766679.

766667 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 766667 - 2⁴ = 766651 is a prime.

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 766667.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766637) 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, 34838 + ... + 34859.

It is an arithmetic number, because the mean of its divisors is an integer number (209094).

2⁷⁶⁶⁶⁶⁷ is an apocalyptic number.

766667 is a deficient number, since it is larger than the sum of its proper divisors (69709).

766667 is a wasteful number, since it uses less digits than its factorization.

766667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69708.

The product of its digits is 63504, while the sum is 38.

The square root of 766667 is about 875.5952261176. The cubic root of 766667 is about 91.5241259403.

The spelling of 766667 in words is "seven hundred sixty-six thousand, six hundred sixty-seven".