7766423617664 has 32 divisors (see below), whose sum is σ = 15524978173740. Its totient is φ = 3869958507520.

The previous prime is 7766423617663. The next prime is 7766423617721. The reversal of 7766423617664 is 4667163246677.

It can be written as a sum of positive squares in 2 ways, for example, as 5225613121600 + 2540810496064 = 2285960^2 + 1593992^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 7766423617664.

It is not an unprimeable number, because it can be changed into a prime (7766423617663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103503767 + ... + 103578774.

Almost surely, 2^{7766423617664} is an apocalyptic number.

It is an amenable number.

7766423617664 is a deficient number, since it is larger than the sum of its proper divisors (7758554556076).

7766423617664 is a wasteful number, since it uses less digits than its factorization.

7766423617664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207082848 (or 207082836 counting only the distinct ones).

The product of its digits is 256048128, while the sum is 65.

The spelling of 7766423617664 in words is "seven trillion, seven hundred sixty-six billion, four hundred twenty-three million, six hundred seventeen thousand, six hundred sixty-four".