7644668664467 has 4 divisors (see below), whose sum is σ = 7644727157496. Its totient is φ = 7644610171440.

The previous prime is 7644668664431. The next prime is 7644668664481.

7644668664467 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7644668664467 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7644668664394 and 7644668664403.

It is not an unprimeable number, because it can be changed into a prime (7644668864467) 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, 29050034 + ... + 29312007.

It is an arithmetic number, because the mean of its divisors is an integer number (1911181789374).

Almost surely, 2^{7644668664467} is an apocalyptic number.

7644668664467 is a deficient number, since it is larger than the sum of its proper divisors (58493029).

7644668664467 is a wasteful number, since it uses less digits than its factorization.

7644668664467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58493028.

The product of its digits is 4682022912, while the sum is 74.

The spelling of 7644668664467 in words is "seven trillion, six hundred forty-four billion, six hundred sixty-eight million, six hundred sixty-four thousand, four hundred sixty-seven".