66152112181 has 8 divisors (see below), whose sum is σ = 66723812064. Its totient is φ = 65582315760.

The previous prime is 66152112179. The next prime is 66152112199. The reversal of 66152112181 is 18121125166.

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 66152112181 - 2¹ = 66152112179 is a prime.

It is a super-2 number, since 2×66152112181² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66152112161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 406015 + ... + 545116.

It is an arithmetic number, because the mean of its divisors is an integer number (8340476508).

Almost surely, 2^66152112181 is an apocalyptic number.

It is an amenable number.

66152112181 is a deficient number, since it is larger than the sum of its proper divisors (571699883).

66152112181 is a wasteful number, since it uses less digits than its factorization.

66152112181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951731.

The product of its digits is 5760, while the sum is 34.

The spelling of 66152112181 in words is "sixty-six billion, one hundred fifty-two million, one hundred twelve thousand, one hundred eighty-one".