33381421166 has 16 divisors (see below), whose sum is σ = 50975949024. Its totient is φ = 16391401344.

The previous prime is 33381421163. The next prime is 33381421231. The reversal of 33381421166 is 66112418333.

It is a super-2 number, since 2×33381421166² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33381421163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 456626 + ... + 524661.

It is an arithmetic number, because the mean of its divisors is an integer number (3185996814).

Almost surely, 2^33381421166 is an apocalyptic number.

33381421166 is a deficient number, since it is larger than the sum of its proper divisors (17594527858).

33381421166 is a wasteful number, since it uses less digits than its factorization.

33381421166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981595.

The product of its digits is 62208, while the sum is 38.

Adding to 33381421166 its reverse (66112418333), we get a palindrome (99493839499).

The spelling of 33381421166 in words is "thirty-three billion, three hundred eighty-one million, four hundred twenty-one thousand, one hundred sixty-six".