21466959276677 has 2 divisors, whose sum is σ = 21466959276678. Its totient is φ = 21466959276676.

The previous prime is 21466959276667. The next prime is 21466959276691. The reversal of 21466959276677 is 77667295966412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18693248897761 + 2773710378916 = 4323569^2 + 1665446^2 .

It is a cyclic number.

It is not a de Polignac number, because 21466959276677 - 2¹⁰ = 21466959275653 is a prime.

It is a super-3 number, since 3×21466959276677³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21466959276598 and 21466959276607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21466959276667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10733479638338 + 10733479638339.

It is an arithmetic number, because the mean of its divisors is an integer number (10733479638339).

Almost surely, 2^{21466959276677} is an apocalyptic number.

It is an amenable number.

21466959276677 is a deficient number, since it is larger than the sum of its proper divisors (1).

21466959276677 is an equidigital number, since it uses as much as digits as its factorization.

21466959276677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880541440, while the sum is 77.

The spelling of 21466959276677 in words is "twenty-one trillion, four hundred sixty-six billion, nine hundred fifty-nine million, two hundred seventy-six thousand, six hundred seventy-seven".