166242021365 has 8 divisors (see below), whose sum is σ = 227989057920. Its totient is φ = 113994528912.

The previous prime is 166242021343. The next prime is 166242021373. The reversal of 166242021365 is 563120242661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166242021365 - 2⁸ = 166242021109 is a prime.

It is a super-2 number, since 2×166242021365² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2374885985 + ... + 2374886054.

It is an arithmetic number, because the mean of its divisors is an integer number (28498632240).

Almost surely, 2^166242021365 is an apocalyptic number.

It is an amenable number.

166242021365 is a deficient number, since it is larger than the sum of its proper divisors (61747036555).

166242021365 is an equidigital number, since it uses as much as digits as its factorization.

166242021365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4749772051.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 166242021365 in words is "one hundred sixty-six billion, two hundred forty-two million, twenty-one thousand, three hundred sixty-five".