10665443550 has 24 divisors (see below), whose sum is σ = 26450300376. Its totient is φ = 2844118240.

The previous prime is 10665443543. The next prime is 10665443563. The reversal of 10665443550 is 5534456601.

It is a super-2 number, since 2×10665443550² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10665443499 and 10665443508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35551329 + ... + 35551628.

It is an arithmetic number, because the mean of its divisors is an integer number (1102095849).

Almost surely, 2^10665443550 is an apocalyptic number.

10665443550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10665443550 is an abundant number, since it is smaller than the sum of its proper divisors (15784856826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10665443550 is a wasteful number, since it uses less digits than its factorization.

10665443550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71102972 (or 71102967 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 39.

The spelling of 10665443550 in words is "ten billion, six hundred sixty-five million, four hundred forty-three thousand, five hundred fifty".