87566180057 has 2 divisors, whose sum is σ = 87566180058. Its totient is φ = 87566180056.

The previous prime is 87566180041. The next prime is 87566180059. The reversal of 87566180057 is 75008166578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63533739481 + 24032440576 = 252059^2 + 155024^2 .

It is a cyclic number.

It is not a de Polignac number, because 87566180057 - 2⁴ = 87566180041 is a prime.

It is a super-5 number, since 5×87566180057⁵ (a number of 56 digits) contains 55555 as substring.

Together with 87566180059, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 87566179990 and 87566180008.

It is not a weakly prime, because it can be changed into another prime (87566180059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43783090028 + 43783090029.

It is an arithmetic number, because the mean of its divisors is an integer number (43783090029).

Almost surely, 2^87566180057 is an apocalyptic number.

It is an amenable number.

87566180057 is a deficient number, since it is larger than the sum of its proper divisors (1).

87566180057 is an equidigital number, since it uses as much as digits as its factorization.

87566180057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2822400, while the sum is 53.

The spelling of 87566180057 in words is "eighty-seven billion, five hundred sixty-six million, one hundred eighty thousand, fifty-seven".