66006420504 has 32 divisors (see below), whose sum is σ = 165491622720. Its totient is φ = 21938730656.

The previous prime is 66006420503. The next prime is 66006420517. The reversal of 66006420504 is 40502460066.

It is a super-2 number, since 2×66006420504² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66006420503) 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, 3954594 + ... + 3971249.

It is an arithmetic number, because the mean of its divisors is an integer number (5171613210).

Almost surely, 2^66006420504 is an apocalyptic number.

It is an amenable number.

66006420504 is an abundant number, since it is smaller than the sum of its proper divisors (99485202216).

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

66006420504 is a wasteful number, since it uses less digits than its factorization.

66006420504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7926199 (or 7926195 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 66006420504 in words is "sixty-six billion, six million, four hundred twenty thousand, five hundred four".