66020193181 has 8 divisors (see below), whose sum is σ = 68311766528. Its totient is φ = 63738738000.

The previous prime is 66020193149. The next prime is 66020193191. The reversal of 66020193181 is 18139102066.

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

It is a cyclic number.

It is not a de Polignac number, because 66020193181 - 2⁵ = 66020193149 is a prime.

It is a super-2 number, since 2×66020193181² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66020193181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66020193101) 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, 2516265 + ... + 2542366.

It is an arithmetic number, because the mean of its divisors is an integer number (8538970816).

Almost surely, 2^66020193181 is an apocalyptic number.

It is an amenable number.

66020193181 is a deficient number, since it is larger than the sum of its proper divisors (2291573347).

66020193181 is a wasteful number, since it uses less digits than its factorization.

66020193181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5059083.

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 66020193181 in words is "sixty-six billion, twenty million, one hundred ninety-three thousand, one hundred eighty-one".