665617630336 has 32 divisors (see below), whose sum is σ = 1328899248000. Its totient is φ = 332089976064.

The previous prime is 665617630261. The next prime is 665617630361. The reversal of 665617630336 is 633036716566.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×665617630336² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5556436 + ... + 5674963.

It is an arithmetic number, because the mean of its divisors is an integer number (41528101500).

Almost surely, 2^665617630336 is an apocalyptic number.

It is an amenable number.

665617630336 is a deficient number, since it is larger than the sum of its proper divisors (663281617664).

665617630336 is a wasteful number, since it uses less digits than its factorization.

665617630336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11231876 (or 11231864 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 52.

The spelling of 665617630336 in words is "six hundred sixty-five billion, six hundred seventeen million, six hundred thirty thousand, three hundred thirty-six".