76644644667 has 16 divisors (see below), whose sum is σ = 102373284480. Its totient is φ = 51006298752.

The previous prime is 76644644603. The next prime is 76644644669.

76644644667 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 76644644667 - 2⁶ = 76644644603 is a prime.

It is a super-2 number, since 2×76644644667² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 76644644667.

It is not an unprimeable number, because it can be changed into a prime (76644644669) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4267368 + ... + 4285290.

It is an arithmetic number, because the mean of its divisors is an integer number (6398330280).

Almost surely, 2^76644644667 is an apocalyptic number.

76644644667 is a deficient number, since it is larger than the sum of its proper divisors (25728639813).

76644644667 is a wasteful number, since it uses less digits than its factorization.

76644644667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20362.

The product of its digits is 97542144, while the sum is 60.

The spelling of 76644644667 in words is "seventy-six billion, six hundred forty-four million, six hundred forty-four thousand, six hundred sixty-seven".