65666338 has 16 divisors (see below), whose sum is σ = 102332160. Its totient is φ = 31578400.

The previous prime is 65666323. The next prime is 65666371. The reversal of 65666338 is 83366656.

It is a junction number, because it is equal to n+sod(n) for n = 65666294 and 65666303.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183 + ... + 11461.

It is an arithmetic number, because the mean of its divisors is an integer number (6395760).

Almost surely, 2^65666338 is an apocalyptic number.

65666338 is a deficient number, since it is larger than the sum of its proper divisors (36665822).

65666338 is a wasteful number, since it uses less digits than its factorization.

65666338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11393.

The product of its digits is 466560, while the sum is 43.

The square root of 65666338 is about 8103.4769080932. The cubic root of 65666338 is about 403.4418369526.

The spelling of 65666338 in words is "sixty-five million, six hundred sixty-six thousand, three hundred thirty-eight".