665022616 has 8 divisors (see below), whose sum is σ = 1246917420. Its totient is φ = 332511304.

The previous prime is 665022593. The next prime is 665022619. The reversal of 665022616 is 616220566.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665022619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41563906 + ... + 41563921.

Almost surely, 2^665022616 is an apocalyptic number.

It is an amenable number.

665022616 is a deficient number, since it is larger than the sum of its proper divisors (581894804).

665022616 is a wasteful number, since it uses less digits than its factorization.

665022616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83127833 (or 83127829 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 665022616 is about 25788.0324181586. The cubic root of 665022616 is about 872.8617683528.

The spelling of 665022616 in words is "six hundred sixty-five million, twenty-two thousand, six hundred sixteen".