665425151 has 2 divisors, whose sum is σ = 665425152. Its totient is φ = 665425150.

The previous prime is 665425147. The next prime is 665425157. The reversal of 665425151 is 151524566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665425151 - 2² = 665425147 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665425157) 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 as a sum of consecutive naturals, namely, 332712575 + 332712576.

It is an arithmetic number, because the mean of its divisors is an integer number (332712576).

Almost surely, 2^665425151 is an apocalyptic number.

665425151 is a deficient number, since it is larger than the sum of its proper divisors (1).

665425151 is an equidigital number, since it uses as much as digits as its factorization.

665425151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36000, while the sum is 35.

The square root of 665425151 is about 25795.8359236525. The cubic root of 665425151 is about 873.0378458453.

The spelling of 665425151 in words is "six hundred sixty-five million, four hundred twenty-five thousand, one hundred fifty-one".