26666466677 has 2 divisors, whose sum is σ = 26666466678. Its totient is φ = 26666466676.

The previous prime is 26666466661. The next prime is 26666466721. The reversal of 26666466677 is 77666466662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18915601156 + 7750865521 = 137534^2 + 88039^2 .

It is a cyclic number.

It is not a de Polignac number, because 26666466677 - 2⁴ = 26666466661 is a prime.

It is a super-2 number, since 2×26666466677² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26666466637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13333233338 + 13333233339.

It is an arithmetic number, because the mean of its divisors is an integer number (13333233339).

Almost surely, 2^26666466677 is an apocalyptic number.

It is an amenable number.

26666466677 is a deficient number, since it is larger than the sum of its proper divisors (1).

26666466677 is an equidigital number, since it uses as much as digits as its factorization.

26666466677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109734912, while the sum is 62.

The spelling of 26666466677 in words is "twenty-six billion, six hundred sixty-six million, four hundred sixty-six thousand, six hundred seventy-seven".