7720662864 has 20 divisors (see below), whose sum is σ = 19945045856. Its totient is φ = 2573554272.

The previous prime is 7720662853. The next prime is 7720662883. The reversal of 7720662864 is 4682660277.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 160847143 = 7720662864 / (7 + 7 + 2 + 0 + 6 + 6 + 2 + 8 + 6 + 4).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80423524 + ... + 80423619.

Almost surely, 2^7720662864 is an apocalyptic number.

It is an amenable number.

7720662864 is an abundant number, since it is smaller than the sum of its proper divisors (12224382992).

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

7720662864 is a wasteful number, since it uses less digits than its factorization.

7720662864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160847154 (or 160847148 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 48.

The square root of 7720662864 is about 87867.3025874813. The cubic root of 7720662864 is about 1976.4455892188.

The spelling of 7720662864 in words is "seven billion, seven hundred twenty million, six hundred sixty-two thousand, eight hundred sixty-four".