64675699776 has 672 divisors, whose sum is σ = 217919808000. Its totient is φ = 18718801920.

The previous prime is 64675699769. The next prime is 64675699787. The reversal of 64675699776 is 67799657646.

64675699776 is a `hidden beast` number, since 6 + 467 + 5 + 6 + 9 + 97 + 76 = 666.

64675699776 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64675699776² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 818679705 + ... + 818679783.

Almost surely, 2^64675699776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64675699776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108959904000).

64675699776 is an abundant number, since it is smaller than the sum of its proper divisors (153244108224).

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

64675699776 is a wasteful number, since it uses less digits than its factorization.

64675699776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 161 counting only the distinct ones).

The product of its digits is 720135360, while the sum is 72.

The spelling of 64675699776 in words is "sixty-four billion, six hundred seventy-five million, six hundred ninety-nine thousand, seven hundred seventy-six".