1660866061328 has 10 divisors (see below), whose sum is σ = 3217927993854. Its totient is φ = 830433030656.

The previous prime is 1660866061273. The next prime is 1660866061399. The reversal of 1660866061328 is 8231606680661.

It can be written as a sum of positive squares in only one way, i.e., 1462474211584 + 198391849744 = 1209328^2 + 445412^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1660866061328.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51902064401 + ... + 51902064432.

Almost surely, 2^{1660866061328} is an apocalyptic number.

It is an amenable number.

1660866061328 is a deficient number, since it is larger than the sum of its proper divisors (1557061932526).

1660866061328 is a wasteful number, since it uses less digits than its factorization.

1660866061328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103804128841 (or 103804128835 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 53.

The spelling of 1660866061328 in words is "one trillion, six hundred sixty billion, eight hundred sixty-six million, sixty-one thousand, three hundred twenty-eight".