66783542 has 8 divisors (see below), whose sum is σ = 114486096. Its totient is φ = 28621512.

The previous prime is 66783533. The next prime is 66783571. The reversal of 66783542 is 24538766.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 66783542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2385113 + ... + 2385140.

It is an arithmetic number, because the mean of its divisors is an integer number (14310762).

Almost surely, 2^66783542 is an apocalyptic number.

66783542 is a deficient number, since it is larger than the sum of its proper divisors (47702554).

66783542 is a wasteful number, since it uses less digits than its factorization.

66783542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4770262.

The product of its digits is 241920, while the sum is 41.

The square root of 66783542 is about 8172.1197984366. The cubic root of 66783542 is about 405.7169478316.

The spelling of 66783542 in words is "sixty-six million, seven hundred eighty-three thousand, five hundred forty-two".