665224636487 has 8 divisors (see below), whose sum is σ = 700256880000. Its totient is φ = 630194435064.

The previous prime is 665224636459. The next prime is 665224636511. The reversal of 665224636487 is 784636422566.

It is a happy number.

665224636487 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 665224636487 - 2³⁶ = 596505159751 is a prime.

It is a super-2 number, since 2×665224636487² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665224636387) 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, 182264 + ... + 1167762.

It is an arithmetic number, because the mean of its divisors is an integer number (87532110000).

Almost surely, 2^665224636487 is an apocalyptic number.

665224636487 is a deficient number, since it is larger than the sum of its proper divisors (35032243513).

665224636487 is a wasteful number, since it uses less digits than its factorization.

665224636487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021045.

The product of its digits is 69672960, while the sum is 59.

The spelling of 665224636487 in words is "six hundred sixty-five billion, two hundred twenty-four million, six hundred thirty-six thousand, four hundred eighty-seven".