10666885820 has 24 divisors (see below), whose sum is σ = 22418708928. Its totient is φ = 4263278400.

The previous prime is 10666885819. The next prime is 10666885843. The reversal of 10666885820 is 2858866601.

It is a super-2 number, since 2×10666885820² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192011 + ... + 241250.

It is an arithmetic number, because the mean of its divisors is an integer number (934112872).

Almost surely, 2^10666885820 is an apocalyptic number.

10666885820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10666885820 is an abundant number, since it is smaller than the sum of its proper divisors (11751823108).

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

10666885820 is a wasteful number, since it uses less digits than its factorization.

10666885820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434501 (or 434499 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 50.

It can be divided in two parts, 1066 and 6885820, that added together give a palindrome (6886886).

The spelling of 10666885820 in words is "ten billion, six hundred sixty-six million, eight hundred eighty-five thousand, eight hundred twenty".