1666323661060 has 24 divisors (see below), whose sum is σ = 3500581132440. Its totient is φ = 666281570304.

The previous prime is 1666323661043. The next prime is 1666323661063. The reversal of 1666323661060 is 601663236661.

It can be written as a sum of positive squares in 4 ways, for example, as 260377513984 + 1405946147076 = 510272^2 + 1185726^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1666323661060.

It is not an unprimeable number, because it can be changed into a prime (1666323661063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15438259 + ... + 15545818.

It is an arithmetic number, because the mean of its divisors is an integer number (145857547185).

Almost surely, 2^{1666323661060} is an apocalyptic number.

1666323661060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666323661060 is an abundant number, since it is smaller than the sum of its proper divisors (1834257471380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666323661060 is a wasteful number, since it uses less digits than its factorization.

1666323661060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30986775 (or 30986773 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 46.

The spelling of 1666323661060 in words is "one trillion, six hundred sixty-six billion, three hundred twenty-three million, six hundred sixty-one thousand, sixty".