65617616 has 10 divisors (see below), whose sum is σ = 127134162. Its totient is φ = 32808800.

The previous prime is 65617609. The next prime is 65617681. The reversal of 65617616 is 61671656.

It can be written as a sum of positive squares in only one way, i.e., 60777616 + 4840000 = 7796^2 + 2200^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 65617616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2050535 + ... + 2050566.

Almost surely, 2^65617616 is an apocalyptic number.

It is an amenable number.

65617616 is a deficient number, since it is larger than the sum of its proper divisors (61516546).

65617616 is a wasteful number, since it uses less digits than its factorization.

65617616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4101109 (or 4101103 counting only the distinct ones).

The product of its digits is 45360, while the sum is 38.

The square root of 65617616 is about 8100.4701098146. The cubic root of 65617616 is about 403.3420326122.

The spelling of 65617616 in words is "sixty-five million, six hundred seventeen thousand, six hundred sixteen".