665874140153 has 4 divisors (see below), whose sum is σ = 665903797860. Its totient is φ = 665844482448.

The previous prime is 665874140143. The next prime is 665874140161. The reversal of 665874140153 is 351041478566.

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 549669511609 + 116204628544 = 741397^2 + 340888^2 .

It is a cyclic number.

It is not a de Polignac number, because 665874140153 - 2¹⁶ = 665874074617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665874140143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14795150 + ... + 14840087.

It is an arithmetic number, because the mean of its divisors is an integer number (166475949465).

Almost surely, 2^665874140153 is an apocalyptic number.

It is an amenable number.

665874140153 is a deficient number, since it is larger than the sum of its proper divisors (29657707).

665874140153 is a wasteful number, since it uses less digits than its factorization.

665874140153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29657706.

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 665874140153 in words is "six hundred sixty-five billion, eight hundred seventy-four million, one hundred forty thousand, one hundred fifty-three".