66708041842 has 16 divisors (see below), whose sum is σ = 107842797720. Its totient is φ = 30764426112.

The previous prime is 66708041831. The next prime is 66708041857. The reversal of 66708041842 is 24814080766.

66708041842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 258279²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 54117182161 + 12590859681 = 232631^2 + 112209^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66708041792 and 66708041801.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 961713 + ... + 1028740.

Almost surely, 2^66708041842 is an apocalyptic number.

66708041842 is a deficient number, since it is larger than the sum of its proper divisors (41134755878).

66708041842 is a wasteful number, since it uses less digits than its factorization.

66708041842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991757.

The product of its (nonzero) digits is 516096, while the sum is 46.

The spelling of 66708041842 in words is "sixty-six billion, seven hundred eight million, forty-one thousand, eight hundred forty-two".