161666052651010 has 8 divisors (see below), whose sum is σ = 290998894771836. Its totient is φ = 64666421060400.

The previous prime is 161666052650969. The next prime is 161666052651011. The reversal of 161666052651010 is 10156250666161.

It can be written as a sum of positive squares in 2 ways, for example, as 143117603933329 + 18548448717681 = 11963177^2 + 4306791^2 .

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

It is a super-2 number, since 2×161666052651010² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161666052651011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8083302632541 + ... + 8083302632560.

Almost surely, 2^{161666052651010} is an apocalyptic number.

161666052651010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161666052651010 is a deficient number, since it is larger than the sum of its proper divisors (129332842120826).

161666052651010 is a wasteful number, since it uses less digits than its factorization.

161666052651010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16166605265108.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 161666052651010 in words is "one hundred sixty-one trillion, six hundred sixty-six billion, fifty-two million, six hundred fifty-one thousand, ten".