766663716 has 96 divisors (see below), whose sum is σ = 2229821440. Its totient is φ = 199615104.

The previous prime is 766663649. The next prime is 766663721. The reversal of 766663716 is 617366667.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81825 + ... + 90711.

Almost surely, 2^766663716 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 766663716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1114910720).

766663716 is an abundant number, since it is smaller than the sum of its proper divisors (1463157724).

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

766663716 is a wasteful number, since it uses less digits than its factorization.

766663716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8993 (or 8991 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 48.

The square root of 766663716 is about 27688.6929268971. The cubic root of 766663716 is about 915.2399525960.

The spelling of 766663716 in words is "seven hundred sixty-six million, six hundred sixty-three thousand, seven hundred sixteen".