766888668 has 96 divisors (see below), whose sum is σ = 2447083520. Its totient is φ = 202253760.

The previous prime is 766888643. The next prime is 766888721. The reversal of 766888668 is 866888667.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

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, 29188 + ... + 48843.

Almost surely, 2^766888668 is an apocalyptic number.

766888668 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

766888668 is an abundant number, since it is smaller than the sum of its proper divisors (1680194852).

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

766888668 is a wasteful number, since it uses less digits than its factorization.

766888668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78064 (or 78056 counting only the distinct ones).

The product of its digits is 37158912, while the sum is 63.

The square root of 766888668 is about 27692.7547925446. The cubic root of 766888668 is about 915.3294594294.

Subtracting 766888668 from its reverse (866888667), we obtain a palindrome (99999999).

The spelling of 766888668 in words is "seven hundred sixty-six million, eight hundred eighty-eight thousand, six hundred sixty-eight".