247491166057 has 2 divisors, whose sum is σ = 247491166058. Its totient is φ = 247491166056.

The previous prime is 247491166051. The next prime is 247491166099. The reversal of 247491166057 is 750661194742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 247387859161 + 103306896 = 497381^2 + 10164^2 .

It is a cyclic number.

It is not a de Polignac number, because 247491166057 - 2³ = 247491166049 is a prime.

It is a super-2 number, since 2×247491166057² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247491165995 and 247491166013.

It is not a weakly prime, because it can be changed into another prime (247491166051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123745583028 + 123745583029.

It is an arithmetic number, because the mean of its divisors is an integer number (123745583029).

Almost surely, 2^247491166057 is an apocalyptic number.

It is an amenable number.

247491166057 is a deficient number, since it is larger than the sum of its proper divisors (1).

247491166057 is an equidigital number, since it uses as much as digits as its factorization.

247491166057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 247491166057 in words is "two hundred forty-seven billion, four hundred ninety-one million, one hundred sixty-six thousand, fifty-seven".