665425153 has 4 divisors (see below), whose sum is σ = 666351360. Its totient is φ = 664498948.

The previous prime is 665425151. The next prime is 665425157. The reversal of 665425153 is 351524566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 351524566 = 2 ⋅175762283.

It is a cyclic number.

It is not a de Polignac number, because 665425153 - 2¹ = 665425151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665425151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462025 + ... + 463462.

It is an arithmetic number, because the mean of its divisors is an integer number (166587840).

Almost surely, 2^665425153 is an apocalyptic number.

It is an amenable number.

665425153 is a deficient number, since it is larger than the sum of its proper divisors (926207).

665425153 is an equidigital number, since it uses as much as digits as its factorization.

665425153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926206.

The product of its digits is 108000, while the sum is 37.

The square root of 665425153 is about 25795.8359624184. The cubic root of 665425153 is about 873.0378467200.

The spelling of 665425153 in words is "six hundred sixty-five million, four hundred twenty-five thousand, one hundred fifty-three".