7728682664 has 32 divisors (see below), whose sum is σ = 15838675200. Its totient is φ = 3519701760.

The previous prime is 7728682657. The next prime is 7728682667. The reversal of 7728682664 is 4662868277.

It is not an unprimeable number, because it can be changed into a prime (7728682667) 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, 912374 + ... + 920805.

It is an arithmetic number, because the mean of its divisors is an integer number (494958600).

Almost surely, 2^7728682664 is an apocalyptic number.

It is an amenable number.

7728682664 is an abundant number, since it is smaller than the sum of its proper divisors (8109992536).

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

7728682664 is a wasteful number, since it uses less digits than its factorization.

7728682664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833233 (or 1833229 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 56.

The square root of 7728682664 is about 87912.9266035433. The cubic root of 7728682664 is about 1977.1296933992.

The spelling of 7728682664 in words is "seven billion, seven hundred twenty-eight million, six hundred eighty-two thousand, six hundred sixty-four".