665412371353 has 4 divisors (see below), whose sum is σ = 681641941428. Its totient is φ = 649182801280.

The previous prime is 665412371321. The next prime is 665412371419. The reversal of 665412371353 is 353173214566.

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 9657385984 + 655754985369 = 98272^2 + 809787^2 .

It is a cyclic number.

It is not a de Polignac number, because 665412371353 - 2⁵ = 665412371321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665412371653) 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, 8114784976 + ... + 8114785057.

It is an arithmetic number, because the mean of its divisors is an integer number (170410485357).

Almost surely, 2^665412371353 is an apocalyptic number.

It is an amenable number.

665412371353 is a deficient number, since it is larger than the sum of its proper divisors (16229570075).

665412371353 is a wasteful number, since it uses less digits than its factorization.

665412371353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16229570074.

The product of its digits is 1360800, while the sum is 46.

The spelling of 665412371353 in words is "six hundred sixty-five billion, four hundred twelve million, three hundred seventy-one thousand, three hundred fifty-three".