64916820966 has 8 divisors (see below), whose sum is σ = 129833641944. Its totient is φ = 21638940320.

The previous prime is 64916820931. The next prime is 64916821007. The reversal of 64916820966 is 66902861946.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

64916820966 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5409735075 + ... + 5409735086.

It is an arithmetic number, because the mean of its divisors is an integer number (16229205243).

Almost surely, 2^64916820966 is an apocalyptic number.

64916820966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

64916820966 is a wasteful number, since it uses less digits than its factorization.

64916820966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10819470166.

The product of its (nonzero) digits is 6718464, while the sum is 57.

The spelling of 64916820966 in words is "sixty-four billion, nine hundred sixteen million, eight hundred twenty thousand, nine hundred sixty-six".