66700065752 has 32 divisors (see below), whose sum is σ = 128972844000. Its totient is φ = 32318227200.

The previous prime is 66700065727. The next prime is 66700065799. The reversal of 66700065752 is 25756000766.

It is a super-3 number, since 3×66700065752³ (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 an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 633524 + ... + 731267.

It is an arithmetic number, because the mean of its divisors is an integer number (4030401375).

Almost surely, 2^66700065752 is an apocalyptic number.

It is an amenable number.

66700065752 is a deficient number, since it is larger than the sum of its proper divisors (62272778248).

66700065752 is a wasteful number, since it uses less digits than its factorization.

66700065752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364987 (or 1364983 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 44.

The spelling of 66700065752 in words is "sixty-six billion, seven hundred million, sixty-five thousand, seven hundred fifty-two".