33836685666 has 128 divisors (see below), whose sum is σ = 80834426880. Its totient is φ = 9241247232.

The previous prime is 33836685611. The next prime is 33836685671. The reversal of 33836685666 is 66658663833.

It is a super-2 number, since 2×33836685666² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 42994125 + ... + 42994911.

It is an arithmetic number, because the mean of its divisors is an integer number (631518960).

Almost surely, 2^33836685666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33836685666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40417213440).

33836685666 is an abundant number, since it is smaller than the sum of its proper divisors (46997741214).

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

33836685666 is a wasteful number, since it uses less digits than its factorization.

33836685666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288.

The product of its digits is 67184640, while the sum is 60.

The spelling of 33836685666 in words is "thirty-three billion, eight hundred thirty-six million, six hundred eighty-five thousand, six hundred sixty-six".