66852794881 has 8 divisors (see below), whose sum is σ = 69192720000. Its totient is φ = 64515180240.

The previous prime is 66852794867. The next prime is 66852794927. The reversal of 66852794881 is 18849725866.

It is a happy number.

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 66852794881 - 2¹¹ = 66852792833 is a prime.

It is a super-2 number, since 2×66852794881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66852794381) 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, 518635 + ... + 634576.

It is an arithmetic number, because the mean of its divisors is an integer number (8649090000).

Almost surely, 2^66852794881 is an apocalyptic number.

It is an amenable number.

66852794881 is a deficient number, since it is larger than the sum of its proper divisors (2339925119).

66852794881 is a wasteful number, since it uses less digits than its factorization.

66852794881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155239.

The product of its digits is 46448640, while the sum is 64.

The spelling of 66852794881 in words is "sixty-six billion, eight hundred fifty-two million, seven hundred ninety-four thousand, eight hundred eighty-one".