66575255271424 has 96 divisors (see below), whose sum is σ = 136730156144400. Its totient is φ = 32384558039040.

The previous prime is 66575255271407. The next prime is 66575255271431. The reversal of 66575255271424 is 42417255257566.

It is a super-2 number, since 2×66575255271424² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 816142512 + ... + 816224080.

Almost surely, 2^{66575255271424} is an apocalyptic number.

66575255271424 is a gapful number since it is divisible by the number (64) 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 66575255271424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68365078072200).

66575255271424 is an abundant number, since it is smaller than the sum of its proper divisors (70154900872976).

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

66575255271424 is a wasteful number, since it uses less digits than its factorization.

66575255271424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92399 (or 92379 counting only the distinct ones).

The product of its digits is 141120000, while the sum is 61.

The spelling of 66575255271424 in words is "sixty-six trillion, five hundred seventy-five billion, two hundred fifty-five million, two hundred seventy-one thousand, four hundred twenty-four".