66708535 has 8 divisors (see below), whose sum is σ = 80123040. Its totient is φ = 53318304.

The previous prime is 66708491. The next prime is 66708539. The reversal of 66708535 is 53580766.

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

It is a cyclic number.

It is not a de Polignac number, because 66708535 - 2⁷ = 66708407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66708539) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 661 + ... + 11569.

It is an arithmetic number, because the mean of its divisors is an integer number (10015380).

Almost surely, 2^66708535 is an apocalyptic number.

66708535 is a deficient number, since it is larger than the sum of its proper divisors (13414505).

66708535 is a wasteful number, since it uses less digits than its factorization.

66708535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12137.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 66708535 is about 8167.5293081813. The cubic root of 66708535 is about 405.5649991615.

The spelling of 66708535 in words is "sixty-six million, seven hundred eight thousand, five hundred thirty-five".