890666665776 has 160 divisors (see below), whose sum is σ = 2641369274880. Its totient is φ = 287134274304.

The previous prime is 890666665769. The next prime is 890666665853. The reversal of 890666665776 is 677566666098.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2502495 + ... + 2836161.

It is an arithmetic number, because the mean of its divisors is an integer number (16508557968).

Almost surely, 2^890666665776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 890666665776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1320684637440).

890666665776 is an abundant number, since it is smaller than the sum of its proper divisors (1750702609104).

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

890666665776 is a wasteful number, since it uses less digits than its factorization.

890666665776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333888 (or 333876 counting only the distinct ones).

The product of its (nonzero) digits is 823011840, while the sum is 72.

It can be divided in two parts, 890 and 666665776, that added together give a palindrome (666666666).

The spelling of 890666665776 in words is "eight hundred ninety billion, six hundred sixty-six million, six hundred sixty-five thousand, seven hundred seventy-six".