240166257326081 has 2 divisors, whose sum is σ = 240166257326082. Its totient is φ = 240166257326080.

The previous prime is 240166257326077. The next prime is 240166257326143. The reversal of 240166257326081 is 180623752661042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237881761109056 + 2284496217025 = 15423416^2 + 1511455^2 .

It is a cyclic number.

It is not a de Polignac number, because 240166257326081 - 2² = 240166257326077 is a prime.

It is a super-2 number, since 2×240166257326081² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (240166257326071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120083128663040 + 120083128663041.

It is an arithmetic number, because the mean of its divisors is an integer number (120083128663041).

Almost surely, 2^{240166257326081} is an apocalyptic number.

It is an amenable number.

240166257326081 is a deficient number, since it is larger than the sum of its proper divisors (1).

240166257326081 is an equidigital number, since it uses as much as digits as its factorization.

240166257326081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5806080, while the sum is 53.

The spelling of 240166257326081 in words is "two hundred forty trillion, one hundred sixty-six billion, two hundred fifty-seven million, three hundred twenty-six thousand, eighty-one".