65646896220 has 72 divisors (see below), whose sum is σ = 199190833296. Its totient is φ = 17500396032.

The previous prime is 65646896213. The next prime is 65646896279. The reversal of 65646896220 is 2269864656.

It is a happy number.

65646896220 is a `hidden beast` number, since 6 + 5 + 6 + 4 + 6 + 8 + 9 + 622 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 541299 + ... + 651381.

Almost surely, 2^65646896220 is an apocalyptic number.

65646896220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65646896220 is an abundant number, since it is smaller than the sum of its proper divisors (133543937076).

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

65646896220 is a wasteful number, since it uses less digits than its factorization.

65646896220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113411 (or 113406 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 54.

The spelling of 65646896220 in words is "sixty-five billion, six hundred forty-six million, eight hundred ninety-six thousand, two hundred twenty".