665133427 has 8 divisors (see below), whose sum is σ = 784673792. Its totient is φ = 551723400.

The previous prime is 665133419. The next prime is 665133431. The reversal of 665133427 is 724331566.

665133427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 665133427 - 2³ = 665133419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665133827) 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, 1532349 + ... + 1532782.

It is an arithmetic number, because the mean of its divisors is an integer number (98084224).

Almost surely, 2^665133427 is an apocalyptic number.

665133427 is a deficient number, since it is larger than the sum of its proper divisors (119540365).

665133427 is a wasteful number, since it uses less digits than its factorization.

665133427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3065169.

The product of its digits is 90720, while the sum is 37.

The square root of 665133427 is about 25790.1808252676. The cubic root of 665133427 is about 872.9102465606.

The spelling of 665133427 in words is "six hundred sixty-five million, one hundred thirty-three thousand, four hundred twenty-seven".