66137431684 has 12 divisors (see below), whose sum is σ = 120772701504. Its totient is φ = 31630945544.

The previous prime is 66137431673. The next prime is 66137431747. The reversal of 66137431684 is 48613473166.

It is a super-3 number, since 3×66137431684³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359442472 + ... + 359442655.

It is an arithmetic number, because the mean of its divisors is an integer number (10064391792).

Almost surely, 2^66137431684 is an apocalyptic number.

It is an amenable number.

66137431684 is a deficient number, since it is larger than the sum of its proper divisors (54635269820).

66137431684 is a wasteful number, since it uses less digits than its factorization.

66137431684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718885154 (or 718885152 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 49.

The spelling of 66137431684 in words is "sixty-six billion, one hundred thirty-seven million, four hundred thirty-one thousand, six hundred eighty-four".