1426073665 has 4 divisors (see below), whose sum is σ = 1711288404. Its totient is φ = 1140858928.

The previous prime is 1426073653. The next prime is 1426073717. The reversal of 1426073665 is 5663706241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5663706241 = 73 ⋅77585017.

It can be written as a sum of positive squares in 2 ways, for example, as 205549569 + 1220524096 = 14337^2 + 34936^2 .

It is a cyclic number.

It is not a de Polignac number, because 1426073665 - 2²¹ = 1423976513 is a prime.

It is a Smith number, since the sum of its digits (40) 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142607362 + ... + 142607371.

It is an arithmetic number, because the mean of its divisors is an integer number (427822101).

Almost surely, 2^1426073665 is an apocalyptic number.

It is an amenable number.

1426073665 is a deficient number, since it is larger than the sum of its proper divisors (285214739).

1426073665 is an equidigital number, since it uses as much as digits as its factorization.

1426073665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285214738.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 1426073665 is about 37763.3905389863. The cubic root of 1426073665 is about 1125.5911073032.

The spelling of 1426073665 in words is "one billion, four hundred twenty-six million, seventy-three thousand, six hundred sixty-five".