66475025718 has 8 divisors (see below), whose sum is σ = 132950051448. Its totient is φ = 22158341904.

The previous prime is 66475025641. The next prime is 66475025719. The reversal of 66475025718 is 81752057466.

It is a sphenic number, since it is the product of 3 distinct primes.

66475025718 is an admirable number.

It is a super-3 number, since 3×66475025718³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66475025719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5539585471 + ... + 5539585482.

It is an arithmetic number, because the mean of its divisors is an integer number (16618756431).

Almost surely, 2^66475025718 is an apocalyptic number.

66475025718 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66475025718 is a wasteful number, since it uses less digits than its factorization.

66475025718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11079170958.

The product of its (nonzero) digits is 2822400, while the sum is 51.

The spelling of 66475025718 in words is "sixty-six billion, four hundred seventy-five million, twenty-five thousand, seven hundred eighteen".