665270447 has 8 divisors (see below), whose sum is σ = 687053952. Its totient is φ = 643507200.

The previous prime is 665270413. The next prime is 665270479. The reversal of 665270447 is 744072566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 665270447 - 2⁸ = 665270191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665270407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90743 + ... + 97799.

It is an arithmetic number, because the mean of its divisors is an integer number (85881744).

Almost surely, 2^665270447 is an apocalyptic number.

665270447 is a deficient number, since it is larger than the sum of its proper divisors (21783505).

665270447 is a wasteful number, since it uses less digits than its factorization.

665270447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10129.

The product of its (nonzero) digits is 282240, while the sum is 41.

The square root of 665270447 is about 25792.8371258379. The cubic root of 665270447 is about 872.9701833818.

The spelling of 665270447 in words is "six hundred sixty-five million, two hundred seventy thousand, four hundred forty-seven".