66017139043604 has 48 divisors (see below), whose sum is σ = 140510650275072. Its totient is φ = 26493590548992.

The previous prime is 66017139043579. The next prime is 66017139043643. The reversal of 66017139043604 is 40634093171066.

It is a super-3 number, since 3×66017139043604³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351915032 + ... + 352102575.

It is an arithmetic number, because the mean of its divisors is an integer number (2927305214064).

Almost surely, 2^{66017139043604} is an apocalyptic number.

It is an amenable number.

66017139043604 is an abundant number, since it is smaller than the sum of its proper divisors (74493511231468).

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

66017139043604 is a wasteful number, since it uses less digits than its factorization.

66017139043604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704017832 (or 704017830 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 50.

The spelling of 66017139043604 in words is "sixty-six trillion, seventeen billion, one hundred thirty-nine million, forty-three thousand, six hundred four".