248666081 has 2 divisors, whose sum is σ = 248666082. Its totient is φ = 248666080.

The previous prime is 248666059. The next prime is 248666083. The reversal of 248666081 is 180666842.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166926400 + 81739681 = 12920^2 + 9041^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-248666081 is a prime.

It is a super-2 number, since 2×248666081² = 123669639679797122, which contains 22 as substring.

Together with 248666083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (248666083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124333040 + 124333041.

It is an arithmetic number, because the mean of its divisors is an integer number (124333041).

Almost surely, 2^248666081 is an apocalyptic number.

It is an amenable number.

248666081 is a deficient number, since it is larger than the sum of its proper divisors (1).

248666081 is an equidigital number, since it uses as much as digits as its factorization.

248666081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 248666081 is about 15769.1496600165. The cubic root of 248666081 is about 628.8381045322.

The spelling of 248666081 in words is "two hundred forty-eight million, six hundred sixty-six thousand, eighty-one".