66738535 has 4 divisors (see below), whose sum is σ = 80086248. Its totient is φ = 53390824.

The previous prime is 66738517. The next prime is 66738563. The reversal of 66738535 is 53583766.

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

It is a cyclic number.

It is not a de Polignac number, because 66738535 - 2¹³ = 66730343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66738491 and 66738500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6673849 + ... + 6673858.

It is an arithmetic number, because the mean of its divisors is an integer number (20021562).

Almost surely, 2^66738535 is an apocalyptic number.

66738535 is a deficient number, since it is larger than the sum of its proper divisors (13347713).

66738535 is a wasteful number, since it uses less digits than its factorization.

66738535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13347712.

The product of its digits is 453600, while the sum is 43.

The square root of 66738535 is about 8169.3656424474. The cubic root of 66738535 is about 405.6257866182.

The spelling of 66738535 in words is "sixty-six million, seven hundred thirty-eight thousand, five hundred thirty-five".