744666405 has 32 divisors (see below), whose sum is σ = 1372422144. Its totient is φ = 337732416.

The previous prime is 744666397. The next prime is 744666409. The reversal of 744666405 is 504666447.

It is a happy number.

744666405 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 744666405 - 2³ = 744666397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744666409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14587 + ... + 41256.

It is an arithmetic number, because the mean of its divisors is an integer number (42888192).

Almost surely, 2^744666405 is an apocalyptic number.

It is an amenable number.

744666405 is a deficient number, since it is larger than the sum of its proper divisors (627755739).

744666405 is a wasteful number, since it uses less digits than its factorization.

744666405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55985.

The product of its (nonzero) digits is 483840, while the sum is 42.

The square root of 744666405 is about 27288.5764560924. The cubic root of 744666405 is about 906.4014406926.

Adding to 744666405 its sum of digits (42), we get a palindrome (744666447).

The spelling of 744666405 in words is "seven hundred forty-four million, six hundred sixty-six thousand, four hundred five".