166102745881 has 8 divisors (see below), whose sum is σ = 166414811528. Its totient is φ = 165790800000.

The previous prime is 166102745857. The next prime is 166102745909. The reversal of 166102745881 is 188547201661.

It can be written as a sum of positive squares in 4 ways, for example, as 4325035225 + 161777710656 = 65765^2 + 402216^2 .

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 166102745881 - 2⁵ = 166102745849 is a prime.

It is a super-2 number, since 2×166102745881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166102745381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3038611 + ... + 3092791.

It is an arithmetic number, because the mean of its divisors is an integer number (20801851441).

Almost surely, 2^166102745881 is an apocalyptic number.

It is an amenable number.

166102745881 is a deficient number, since it is larger than the sum of its proper divisors (312065647).

166102745881 is an equidigital number, since it uses as much as digits as its factorization.

166102745881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59883.

The product of its (nonzero) digits is 645120, while the sum is 49.

The spelling of 166102745881 in words is "one hundred sixty-six billion, one hundred two million, seven hundred forty-five thousand, eight hundred eighty-one".