440668661351 has 4 divisors (see below), whose sum is σ = 440670618072. Its totient is φ = 440666704632.

The previous prime is 440668661339. The next prime is 440668661399. The reversal of 440668661351 is 153166866044.

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 440668661351 - 2²⁶ = 440601552487 is a prime.

It is a super-2 number, since 2×440668661351² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 440668661351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440668661311) 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, 588860 + ... + 1108193.

It is an arithmetic number, because the mean of its divisors is an integer number (110167654518).

Almost surely, 2^440668661351 is an apocalyptic number.

440668661351 is a deficient number, since it is larger than the sum of its proper divisors (1956721).

440668661351 is a wasteful number, since it uses less digits than its factorization.

440668661351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956720.

The product of its (nonzero) digits is 2488320, while the sum is 50.

The spelling of 440668661351 in words is "four hundred forty billion, six hundred sixty-eight million, six hundred sixty-one thousand, three hundred fifty-one".