76768664 has 64 divisors (see below), whose sum is σ = 180748800. Its totient is φ = 29804544.

The previous prime is 76768663. The next prime is 76768669. The reversal of 76768664 is 46686767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76768663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22904 + ... + 26040.

It is an arithmetic number, because the mean of its divisors is an integer number (2824200).

Almost surely, 2^76768664 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 76768664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90374400).

76768664 is an abundant number, since it is smaller than the sum of its proper divisors (103980136).

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

76768664 is a wasteful number, since it uses less digits than its factorization.

76768664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3192 (or 3188 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 50.

The square root of 76768664 is about 8761.7728799599. The cubic root of 76768664 is about 425.0056082305.

The spelling of 76768664 in words is "seventy-six million, seven hundred sixty-eight thousand, six hundred sixty-four".