166210600610365 has 4 divisors (see below), whose sum is σ = 199452720732444. Its totient is φ = 132968480488288.

The previous prime is 166210600610357. The next prime is 166210600610393. The reversal of 166210600610365 is 563016006012661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45721033163289 + 120489567447076 = 6761733^2 + 10976774^2 .

It is a cyclic number.

It is not a de Polignac number, because 166210600610365 - 2³ = 166210600610357 is a prime.

It is a super-2 number, since 2×166210600610365² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

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, 16621060061032 + ... + 16621060061041.

It is an arithmetic number, because the mean of its divisors is an integer number (49863180183111).

Almost surely, 2^{166210600610365} is an apocalyptic number.

It is an amenable number.

166210600610365 is a deficient number, since it is larger than the sum of its proper divisors (33242120122079).

166210600610365 is an equidigital number, since it uses as much as digits as its factorization.

166210600610365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33242120122078.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 166210600610365 in words is "one hundred sixty-six trillion, two hundred ten billion, six hundred million, six hundred ten thousand, three hundred sixty-five".