26661011473 has 2 divisors, whose sum is σ = 26661011474. Its totient is φ = 26661011472.

The previous prime is 26661011471. The next prime is 26661011491. The reversal of 26661011473 is 37411016662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23403798289 + 3257213184 = 152983^2 + 57072^2 .

It is a cyclic number.

It is not a de Polignac number, because 26661011473 - 2¹ = 26661011471 is a prime.

Together with 26661011471, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (26661011471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13330505736 + 13330505737.

It is an arithmetic number, because the mean of its divisors is an integer number (13330505737).

Almost surely, 2^26661011473 is an apocalyptic number.

It is an amenable number.

26661011473 is a deficient number, since it is larger than the sum of its proper divisors (1).

26661011473 is an equidigital number, since it uses as much as digits as its factorization.

26661011473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 26661011473 in words is "twenty-six billion, six hundred sixty-one million, eleven thousand, four hundred seventy-three".