64669316976 has 160 divisors (see below), whose sum is σ = 206321437440. Its totient is φ = 19226937600.

The previous prime is 64669316953. The next prime is 64669316977. The reversal of 64669316976 is 67961396646.

64669316976 is a `hidden beast` number, since 6 + 466 + 9 + 3 + 169 + 7 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64669316977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123471 + ... + 380241.

It is an arithmetic number, because the mean of its divisors is an integer number (1289508984).

Almost surely, 2^64669316976 is an apocalyptic number.

64669316976 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64669316976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103160718720).

64669316976 is an abundant number, since it is smaller than the sum of its proper divisors (141652120464).

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

64669316976 is a wasteful number, since it uses less digits than its factorization.

64669316976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256852 (or 256840 counting only the distinct ones).

The product of its digits is 52907904, while the sum is 63.

The spelling of 64669316976 in words is "sixty-four billion, six hundred sixty-nine million, three hundred sixteen thousand, nine hundred seventy-six".