7665555667 has 32 divisors (see below), whose sum is σ = 10136208384. Its totient is φ = 5619715200.

The previous prime is 7665555631. The next prime is 7665555743.

7665555667 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7665555667 - 2¹¹ = 7665553619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7665555617) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 72553 + ... + 143509.

It is an arithmetic number, because the mean of its divisors is an integer number (316756512).

Almost surely, 2^7665555667 is an apocalyptic number.

7665555667 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

7665555667 is a deficient number, since it is larger than the sum of its proper divisors (2470652717).

7665555667 is a wasteful number, since it uses less digits than its factorization.

7665555667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71059.

The product of its digits is 39690000, while the sum is 58.

The square root of 7665555667 is about 87553.1590920625. The cubic root of 7665555667 is about 1971.7319808324.

The spelling of 7665555667 in words is "seven billion, six hundred sixty-five million, five hundred fifty-five thousand, six hundred sixty-seven".