10665111515550 has 48 divisors (see below), whose sum is σ = 26452472884272. Its totient is φ = 2843707552000.

The previous prime is 10665111515543. The next prime is 10665111515567. The reversal of 10665111515550 is 5551511156601.

It is a super-2 number, since 2×10665111515550² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2697351 + ... + 5348450.

It is an arithmetic number, because the mean of its divisors is an integer number (551093185089).

Almost surely, 2^{10665111515550} is an apocalyptic number.

10665111515550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10665111515550 is an abundant number, since it is smaller than the sum of its proper divisors (15787361368722).

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

10665111515550 is a wasteful number, since it uses less digits than its factorization.

10665111515550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8054653 (or 8054648 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 42.

The spelling of 10665111515550 in words is "ten trillion, six hundred sixty-five billion, one hundred eleven million, five hundred fifteen thousand, five hundred fifty".