61684066322 has 18 divisors (see below), whose sum is σ = 94100471829. Its totient is φ = 30325888920.

The previous prime is 61684066289. The next prime is 61684066361. The reversal of 61684066322 is 22366048616.

It can be written as a sum of positive squares in 2 ways, for example, as 41783039281 + 19901027041 = 204409^2 + 141071^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=175619.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 21424079 + ... + 21426957.

Almost surely, 2^61684066322 is an apocalyptic number.

61684066322 is a deficient number, since it is larger than the sum of its proper divisors (32416405507).

61684066322 is an frugal number, since it uses more digits than its factorization.

61684066322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5882 (or 2942 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 44.

The spelling of 61684066322 in words is "sixty-one billion, six hundred eighty-four million, sixty-six thousand, three hundred twenty-two".