66705218324 has 12 divisors (see below), whose sum is σ = 123600845844. Its totient is φ = 31390690944.

The previous prime is 66705218317. The next prime is 66705218351. The reversal of 66705218324 is 42381250766.

It can be written as a sum of positive squares in 2 ways, for example, as 24979802500 + 41725415824 = 158050^2 + 204268^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490479479 + ... + 490479614.

It is an arithmetic number, because the mean of its divisors is an integer number (10300070487).

Almost surely, 2^66705218324 is an apocalyptic number.

It is an amenable number.

66705218324 is a deficient number, since it is larger than the sum of its proper divisors (56895627520).

66705218324 is a wasteful number, since it uses less digits than its factorization.

66705218324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980959114 (or 980959112 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 66705218324 in words is "sixty-six billion, seven hundred five million, two hundred eighteen thousand, three hundred twenty-four".