21466959276671 has 4 divisors (see below), whose sum is σ = 21467075802552. Its totient is φ = 21466842750792.

The previous prime is 21466959276667. The next prime is 21466959276677. The reversal of 21466959276671 is 17667295966412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21466959276671 - 2² = 21466959276667 is a prime.

It is a super-2 number, since 2×21466959276671² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21466959276595 and 21466959276604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21466959276677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57986165 + ... + 58355198.

It is an arithmetic number, because the mean of its divisors is an integer number (5366768950638).

Almost surely, 2^{21466959276671} is an apocalyptic number.

21466959276671 is a deficient number, since it is larger than the sum of its proper divisors (116525881).

21466959276671 is a wasteful number, since it uses less digits than its factorization.

21466959276671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116525880.

The product of its digits is 411505920, while the sum is 71.

The spelling of 21466959276671 in words is "twenty-one trillion, four hundred sixty-six billion, nine hundred fifty-nine million, two hundred seventy-six thousand, six hundred seventy-one".