10664822954921 has 2 divisors, whose sum is σ = 10664822954922. Its totient is φ = 10664822954920.

The previous prime is 10664822954771. The next prime is 10664822954963. The reversal of 10664822954921 is 12945922846601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10242016099225 + 422806855696 = 3200315^2 + 650236^2 .

It is a cyclic number.

It is not a de Polignac number, because 10664822954921 - 2⁴² = 6266776443817 is a prime.

It is a super-2 number, since 2×10664822954921² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10664822974921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5332411477460 + 5332411477461.

It is an arithmetic number, because the mean of its divisors is an integer number (5332411477461).

Almost surely, 2^{10664822954921} is an apocalyptic number.

It is an amenable number.

10664822954921 is a deficient number, since it is larger than the sum of its proper divisors (1).

10664822954921 is an equidigital number, since it uses as much as digits as its factorization.

10664822954921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14929920, while the sum is 59.

The spelling of 10664822954921 in words is "ten trillion, six hundred sixty-four billion, eight hundred twenty-two million, nine hundred fifty-four thousand, nine hundred twenty-one".