7444664447 has 4 divisors (see below), whose sum is σ = 8121452136. Its totient is φ = 6767876760.

The previous prime is 7444664431. The next prime is 7444664471.

7444664447 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 not a de Polignac number, because 7444664447 - 2⁴ = 7444664431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7444664395 and 7444664404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7444664947) 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, 338393828 + ... + 338393849.

It is an arithmetic number, because the mean of its divisors is an integer number (2030363034).

Almost surely, 2^7444664447 is an apocalyptic number.

7444664447 is a deficient number, since it is larger than the sum of its proper divisors (676787689).

7444664447 is a wasteful number, since it uses less digits than its factorization.

7444664447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676787688.

The product of its digits is 7225344, while the sum is 50.

The square root of 7444664447 is about 86282.4689435809. The cubic root of 7444664447 is about 1952.6079020397.

The spelling of 7444664447 in words is "seven billion, four hundred forty-four million, six hundred sixty-four thousand, four hundred forty-seven".