64667011872 has 192 divisors, whose sum is σ = 176502509568. Its totient is φ = 20716800000.

The previous prime is 64667011837. The next prime is 64667011873. The reversal of 64667011872 is 27811076646.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (64667011873) 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, 86107497 + ... + 86108247.

It is an arithmetic number, because the mean of its divisors is an integer number (919283904).

Almost surely, 2^64667011872 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 64667011872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88251254784).

64667011872 is an abundant number, since it is smaller than the sum of its proper divisors (111835497696).

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

64667011872 is a wasteful number, since it uses less digits than its factorization.

64667011872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103 (or 1095 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The spelling of 64667011872 in words is "sixty-four billion, six hundred sixty-seven million, eleven thousand, eight hundred seventy-two".