740728472665 has 4 divisors (see below), whose sum is σ = 888874167204. Its totient is φ = 592582778128.

The previous prime is 740728472647. The next prime is 740728472669. The reversal of 740728472665 is 566274827047.

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

It can be written as a sum of positive squares in 2 ways, for example, as 425859351241 + 314869121424 = 652579^2 + 561132^2 .

It is a cyclic number.

It is not a de Polignac number, because 740728472665 - 2¹⁷ = 740728341593 is a prime.

It is a Smith number, since the sum of its digits (58) 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 (740728472669) 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, 74072847262 + ... + 74072847271.

It is an arithmetic number, because the mean of its divisors is an integer number (222218541801).

Almost surely, 2^740728472665 is an apocalyptic number.

It is an amenable number.

740728472665 is a deficient number, since it is larger than the sum of its proper divisors (148145694539).

740728472665 is a wasteful number, since it uses less digits than its factorization.

740728472665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148145694538.

The product of its (nonzero) digits is 31610880, while the sum is 58.

The spelling of 740728472665 in words is "seven hundred forty billion, seven hundred twenty-eight million, four hundred seventy-two thousand, six hundred sixty-five".