766767666 has 16 divisors (see below), whose sum is σ = 1752611904. Its totient is φ = 219076464.

The previous prime is 766767611. The next prime is 766767697. The reversal of 766767666 is 666767667.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9128145 + ... + 9128228.

It is an arithmetic number, because the mean of its divisors is an integer number (109538244).

Almost surely, 2^766767666 is an apocalyptic number.

766767666 is an abundant number, since it is smaller than the sum of its proper divisors (985844238).

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

766767666 is a wasteful number, since it uses less digits than its factorization.

766767666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18256385.

The product of its digits is 16003008, while the sum is 57.

The square root of 766767666 is about 27690.5699832994. The cubic root of 766767666 is about 915.2813157524.

Subtracting from 766767666 its reverse (666767667), we obtain a palindrome (99999999).

The spelling of 766767666 in words is "seven hundred sixty-six million, seven hundred sixty-seven thousand, six hundred sixty-six".