766066 has 12 divisors (see below), whose sum is σ = 1336878. Its totient is φ = 328272.

The previous prime is 766049. The next prime is 766067. The reversal of 766066 is 660667.

It is a happy number.

766066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 765625 + 441 = 875^2 + 21^2 .

It is not an unprimeable number, because it can be changed into a prime (766067) by changing a digit.

766066 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3811 + ... + 4006.

2⁷⁶⁶⁰⁶⁶ is an apocalyptic number.

766066 is a deficient number, since it is larger than the sum of its proper divisors (570812).

766066 is a wasteful number, since it uses less digits than its factorization.

766066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7833 (or 7826 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 766066 is about 875.2519637224. The cubic root of 766066 is about 91.5002040466.

The spelling of 766066 in words is "seven hundred sixty-six thousand, sixty-six".