7666620768 has 36 divisors (see below), whose sum is σ = 21801953628. Its totient is φ = 2555540160.

The previous prime is 7666620743. The next prime is 7666620799. The reversal of 7666620768 is 8670266667.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13309818 + ... + 13310393.

It is an arithmetic number, because the mean of its divisors is an integer number (605609823).

Almost surely, 2^7666620768 is an apocalyptic number.

It is an amenable number.

7666620768 is an abundant number, since it is smaller than the sum of its proper divisors (14135332860).

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

7666620768 is a wasteful number, since it uses less digits than its factorization.

7666620768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26620227 (or 26620216 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 54.

The square root of 7666620768 is about 87559.2414768424. The cubic root of 7666620768 is about 1971.8232982587.

The spelling of 7666620768 in words is "seven billion, six hundred sixty-six million, six hundred twenty thousand, seven hundred sixty-eight".