744856666753 has 4 divisors (see below), whose sum is σ = 757481356080. Its totient is φ = 732231977428.

The previous prime is 744856666747. The next prime is 744856666777. The reversal of 744856666753 is 357666658447.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 744856666753 - 2²⁵ = 744823112321 is a prime.

It is a super-2 number, since 2×744856666753² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (744856666793) 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 3 ways as a sum of consecutive naturals, for example, 6312344575 + ... + 6312344692.

It is an arithmetic number, because the mean of its divisors is an integer number (189370339020).

Almost surely, 2^744856666753 is an apocalyptic number.

It is an amenable number.

744856666753 is a deficient number, since it is larger than the sum of its proper divisors (12624689327).

744856666753 is a wasteful number, since it uses less digits than its factorization.

744856666753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12624689326.

The product of its digits is 609638400, while the sum is 67.

The spelling of 744856666753 in words is "seven hundred forty-four billion, eight hundred fifty-six million, six hundred sixty-six thousand, seven hundred fifty-three".