65464216664 has 48 divisors (see below), whose sum is σ = 154192592400. Its totient is φ = 25505536320.

The previous prime is 65464216639. The next prime is 65464216669. The reversal of 65464216664 is 46661246456.

It is a super-2 number, since 2×65464216664² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65464216669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4823819 + ... + 4837370.

It is an arithmetic number, because the mean of its divisors is an integer number (3212345675).

Almost surely, 2^65464216664 is an apocalyptic number.

It is an amenable number.

65464216664 is an abundant number, since it is smaller than the sum of its proper divisors (88728375736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65464216664 is a wasteful number, since it uses less digits than its factorization.

65464216664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9661224 (or 9661209 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 50.

The spelling of 65464216664 in words is "sixty-five billion, four hundred sixty-four million, two hundred sixteen thousand, six hundred sixty-four".