66005542 has 8 divisors (see below), whose sum is σ = 100686600. Its totient is φ = 32443344.

The previous prime is 66005507. The next prime is 66005551. The reversal of 66005542 is 24550066.

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 66005542.

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, 279567 + ... + 279802.

It is an arithmetic number, because the mean of its divisors is an integer number (12585825).

Almost surely, 2^66005542 is an apocalyptic number.

66005542 is a deficient number, since it is larger than the sum of its proper divisors (34681058).

66005542 is a wasteful number, since it uses less digits than its factorization.

66005542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559430.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 66005542 is about 8124.3794839975. The cubic root of 66005542 is about 404.1353131356.

The spelling of 66005542 in words is "sixty-six million, five thousand, five hundred forty-two".