2166106620602 has 24 divisors (see below), whose sum is σ = 3456239201436. Its totient is φ = 1017953445888.

The previous prime is 2166106620599. The next prime is 2166106620607. The reversal of 2166106620602 is 2060266016612.

It can be written as a sum of positive squares in 6 ways, for example, as 2011515321841 + 154591298761 = 1418279^2 + 393181^2 .

It is not an unprimeable number, because it can be changed into a prime (2166106620607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2132663 + ... + 2980010.

Almost surely, 2^{2166106620602} is an apocalyptic number.

2166106620602 is a deficient number, since it is larger than the sum of its proper divisors (1290132580834).

2166106620602 is a wasteful number, since it uses less digits than its factorization.

2166106620602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5113442 (or 5113425 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 2166106620602 in words is "two trillion, one hundred sixty-six billion, one hundred six million, six hundred twenty thousand, six hundred two".