766716406666 has 96 divisors (see below), whose sum is σ = 1465764491520. Its totient is φ = 293078725632.

The previous prime is 766716406663. The next prime is 766716406669. The reversal of 766716406666 is 666604617667.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (766716406663) and next prime (766716406669).

It is not an unprimeable number, because it can be changed into a prime (766716406661) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65030700 + ... + 65042488.

It is an arithmetic number, because the mean of its divisors is an integer number (15268380120).

Almost surely, 2^766716406666 is an apocalyptic number.

766716406666 is a deficient number, since it is larger than the sum of its proper divisors (699048084854).

766716406666 is a wasteful number, since it uses less digits than its factorization.

766716406666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12056 (or 11947 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 61.

The spelling of 766716406666 in words is "seven hundred sixty-six billion, seven hundred sixteen million, four hundred six thousand, six hundred sixty-six".