66753338 has 4 divisors (see below), whose sum is σ = 100130010. Its totient is φ = 33376668.

The previous prime is 66753307. The next prime is 66753347. The reversal of 66753338 is 83335766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 66308449 + 444889 = 8143^2 + 667^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66753295 and 66753304.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16688333 + ... + 16688336.

Almost surely, 2^66753338 is an apocalyptic number.

66753338 is a deficient number, since it is larger than the sum of its proper divisors (33376672).

66753338 is a wasteful number, since it uses less digits than its factorization.

66753338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33376671.

The product of its digits is 272160, while the sum is 41.

The square root of 66753338 is about 8170.2715989127. The cubic root of 66753338 is about 405.6557744637.

It can be divided in two parts, 6675 and 3338, that multiplied together give a triangular number (22281150 = T₆₆₇₅).

The spelling of 66753338 in words is "sixty-six million, seven hundred fifty-three thousand, three hundred thirty-eight".