665464627 has 4 divisors (see below), whose sum is σ = 665833896. Its totient is φ = 665095360.

The previous prime is 665464601. The next prime is 665464649. The reversal of 665464627 is 726464566.

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 665464627 - 2¹¹ = 665462579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665464687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181918 + ... + 185539.

It is an arithmetic number, because the mean of its divisors is an integer number (166458474).

Almost surely, 2^665464627 is an apocalyptic number.

665464627 is a deficient number, since it is larger than the sum of its proper divisors (369269).

665464627 is a wasteful number, since it uses less digits than its factorization.

665464627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369268.

The product of its digits is 1451520, while the sum is 46.

The square root of 665464627 is about 25796.6010745602. The cubic root of 665464627 is about 873.0551096755.

The spelling of 665464627 in words is "six hundred sixty-five million, four hundred sixty-four thousand, six hundred twenty-seven".