665211464 has 16 divisors (see below), whose sum is σ = 1249758720. Its totient is φ = 331942480.

The previous prime is 665211461. The next prime is 665211487. The reversal of 665211464 is 464112566.

It is not an unprimeable number, because it can be changed into a prime (665211461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78632 + ... + 86679.

It is an arithmetic number, because the mean of its divisors is an integer number (78109920).

Almost surely, 2^665211464 is an apocalyptic number.

It is an amenable number.

665211464 is a deficient number, since it is larger than the sum of its proper divisors (584547256).

665211464 is a wasteful number, since it uses less digits than its factorization.

665211464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165820 (or 165816 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 665211464 is about 25791.6937016552. The cubic root of 665211464 is about 872.9443833870.

The spelling of 665211464 in words is "six hundred sixty-five million, two hundred eleven thousand, four hundred sixty-four".