166886000881 has 2 divisors, whose sum is σ = 166886000882. Its totient is φ = 166886000880.

The previous prime is 166886000849. The next prime is 166886000903. The reversal of 166886000881 is 188000688661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159647394481 + 7238606400 = 399559^2 + 85080^2 .

It is an emirp because it is prime and its reverse (188000688661) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 188000988991 and 199889000881.

It is a cyclic number.

It is not a de Polignac number, because 166886000881 - 2⁵ = 166886000849 is a prime.

It is a super-2 number, since 2×166886000881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166886001881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83443000440 + 83443000441.

It is an arithmetic number, because the mean of its divisors is an integer number (83443000441).

Almost surely, 2^166886000881 is an apocalyptic number.

It is an amenable number.

166886000881 is a deficient number, since it is larger than the sum of its proper divisors (1).

166886000881 is an equidigital number, since it uses as much as digits as its factorization.

166886000881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 884736, while the sum is 52.

The spelling of 166886000881 in words is "one hundred sixty-six billion, eight hundred eighty-six million, eight hundred eighty-one", and thus it is an aban number.