26666478032531 has 2 divisors, whose sum is σ = 26666478032532. Its totient is φ = 26666478032530.

The previous prime is 26666478032497. The next prime is 26666478032549. The reversal of 26666478032531 is 13523087466662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26666478032531 - 2¹⁰ = 26666478031507 is a prime.

It is a super-2 number, since 2×26666478032531² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (26666478032581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13333239016265 + 13333239016266.

It is an arithmetic number, because the mean of its divisors is an integer number (13333239016266).

Almost surely, 2^{26666478032531} is an apocalyptic number.

26666478032531 is a deficient number, since it is larger than the sum of its proper divisors (1).

26666478032531 is an equidigital number, since it uses as much as digits as its factorization.

26666478032531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52254720, while the sum is 59.

The spelling of 26666478032531 in words is "twenty-six trillion, six hundred sixty-six billion, four hundred seventy-eight million, thirty-two thousand, five hundred thirty-one".