166000631016365 has 4 divisors (see below), whose sum is σ = 199200757219644. Its totient is φ = 132800504813088.

The previous prime is 166000631016349. The next prime is 166000631016379. The reversal of 166000631016365 is 563610136000661.

It is a happy number.

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 27028550812201 + 138972080204164 = 5198899^2 + 11788642^2 .

It is a cyclic number.

It is not a de Polignac number, because 166000631016365 - 2⁴ = 166000631016349 is a prime.

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, 16600063101632 + ... + 16600063101641.

It is an arithmetic number, because the mean of its divisors is an integer number (49800189304911).

Almost surely, 2^{166000631016365} is an apocalyptic number.

It is an amenable number.

166000631016365 is a deficient number, since it is larger than the sum of its proper divisors (33200126203279).

166000631016365 is an equidigital number, since it uses as much as digits as its factorization.

166000631016365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33200126203278.

The product of its (nonzero) digits is 349920, while the sum is 44.

The spelling of 166000631016365 in words is "one hundred sixty-six trillion, six hundred thirty-one million, sixteen thousand, three hundred sixty-five".