665314147 has 4 divisors (see below), whose sum is σ = 667903176. Its totient is φ = 662725120.

The previous prime is 665314121. The next prime is 665314151. The reversal of 665314147 is 741413566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 665314147 - 2⁷ = 665314019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665324147) 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, 1294129 + ... + 1294642.

It is an arithmetic number, because the mean of its divisors is an integer number (166975794).

Almost surely, 2^665314147 is an apocalyptic number.

665314147 is a deficient number, since it is larger than the sum of its proper divisors (2589029).

665314147 is a wasteful number, since it uses less digits than its factorization.

665314147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2589028.

The product of its digits is 60480, while the sum is 37.

The square root of 665314147 is about 25793.6842463422. The cubic root of 665314147 is about 872.9892973937.

The spelling of 665314147 in words is "six hundred sixty-five million, three hundred fourteen thousand, one hundred forty-seven".