766961988 has 24 divisors (see below), whose sum is σ = 1927238208. Its totient is φ = 235988256.

The previous prime is 766961981. The next prime is 766961989. The reversal of 766961988 is 889169667.

It is not an unprimeable number, because it can be changed into a prime (766961981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2458056 + ... + 2458367.

It is an arithmetic number, because the mean of its divisors is an integer number (80301592).

Almost surely, 2^766961988 is an apocalyptic number.

766961988 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

766961988 is an abundant number, since it is smaller than the sum of its proper divisors (1160276220).

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

766961988 is a wasteful number, since it uses less digits than its factorization.

766961988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4916443 (or 4916441 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 60.

The square root of 766961988 is about 27694.0785728646. The cubic root of 766961988 is about 915.3586291642.

The spelling of 766961988 in words is "seven hundred sixty-six million, nine hundred sixty-one thousand, nine hundred eighty-eight".