766988856 has 96 divisors (see below), whose sum is σ = 2163957120. Its totient is φ = 245145600.

The previous prime is 766988837. The next prime is 766988857. The reversal of 766988856 is 658889667.

It is a junction number, because it is equal to n+sod(n) for n = 766988793 and 766988802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766988857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 250696 + ... + 253736.

It is an arithmetic number, because the mean of its divisors is an integer number (22541220).

Almost surely, 2^766988856 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 766988856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1081978560).

766988856 is an abundant number, since it is smaller than the sum of its proper divisors (1396968264).

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

766988856 is a wasteful number, since it uses less digits than its factorization.

766988856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3197 (or 3190 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The square root of 766988856 is about 27694.5636542625. The cubic root of 766988856 is about 915.3693179028.

The spelling of 766988856 in words is "seven hundred sixty-six million, nine hundred eighty-eight thousand, eight hundred fifty-six".