840880881066 has 16 divisors (see below), whose sum is σ = 1681777872000. Its totient is φ = 280290942048.

The previous prime is 840880881019. The next prime is 840880881073. The reversal of 840880881066 is 660188088048.

It is a happy number.

It is a super-2 number, since 2×840880881066² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 840880880997 and 840880881015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70335 + ... + 1298733.

It is an arithmetic number, because the mean of its divisors is an integer number (105111117000).

Almost surely, 2^840880881066 is an apocalyptic number.

840880881066 is an abundant number, since it is smaller than the sum of its proper divisors (840896990934).

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

840880881066 is a wasteful number, since it uses less digits than its factorization.

840880881066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342493.

The product of its (nonzero) digits is 4718592, while the sum is 57.

The spelling of 840880881066 in words is "eight hundred forty billion, eight hundred eighty million, eight hundred eighty-one thousand, sixty-six".