33661138 has 12 divisors (see below), whose sum is σ = 58735422. Its totient is φ = 14426160.

The previous prime is 33661127. The next prime is 33661151. The reversal of 33661138 is 83116633.

It can be written as a sum of positive squares in only one way, i.e., 32228329 + 1432809 = 5677^2 + 1197^2 .

It is a super-2 number, since 2×33661138² = 2266144422910088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 171643 + ... + 171838.

Almost surely, 2^33661138 is an apocalyptic number.

33661138 is a deficient number, since it is larger than the sum of its proper divisors (25074284).

33661138 is a wasteful number, since it uses less digits than its factorization.

33661138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343497 (or 343490 counting only the distinct ones).

The product of its digits is 7776, while the sum is 31.

The square root of 33661138 is about 5801.8219552137. The cubic root of 33661138 is about 322.8813284747.

The spelling of 33661138 in words is "thirty-three million, six hundred sixty-one thousand, one hundred thirty-eight".