10666443551 has 4 divisors (see below), whose sum is σ = 10690200000. Its totient is φ = 10642687104.

The previous prime is 10666443527. The next prime is 10666443553. The reversal of 10666443551 is 15534466601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15534466601 = 17 ⋅913792153.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10666443551 is a prime.

It is a super-2 number, since 2×10666443551² (a number of 21 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 = 10666443499 and 10666443508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10666443553) 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, 11877551 + ... + 11878448.

It is an arithmetic number, because the mean of its divisors is an integer number (2672550000).

Almost surely, 2^10666443551 is an apocalyptic number.

10666443551 is a deficient number, since it is larger than the sum of its proper divisors (23756449).

10666443551 is an equidigital number, since it uses as much as digits as its factorization.

10666443551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23756448.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 10666443551 in words is "ten billion, six hundred sixty-six million, four hundred forty-three thousand, five hundred fifty-one".