66075065472 has 64 divisors (see below), whose sum is σ = 189012821760. Its totient is φ = 20330787840.

The previous prime is 66075065467. The next prime is 66075065473. The reversal of 66075065472 is 27456057066.

It is a tau number, because it is divible by the number of its divisors (64).

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 (66075065473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6613104 + ... + 6623087.

It is an arithmetic number, because the mean of its divisors is an integer number (2953325340).

Almost surely, 2^66075065472 is an apocalyptic number.

It is an amenable number.

66075065472 is an abundant number, since it is smaller than the sum of its proper divisors (122937756288).

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

66075065472 is a wasteful number, since it uses less digits than its factorization.

66075065472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13236221 (or 13236209 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 48.

The spelling of 66075065472 in words is "sixty-six billion, seventy-five million, sixty-five thousand, four hundred seventy-two".