66708794 has 4 divisors (see below), whose sum is σ = 100063194. Its totient is φ = 33354396.

The previous prime is 66708779. The next prime is 66708797. The reversal of 66708794 is 49780766.

It is a happy number.

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., 63600625 + 3108169 = 7975^2 + 1763^2 .

It is not an unprimeable number, because it can be changed into a prime (66708797) 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 as a sum of consecutive naturals, namely, 16677197 + ... + 16677200.

Almost surely, 2^66708794 is an apocalyptic number.

66708794 is a deficient number, since it is larger than the sum of its proper divisors (33354400).

66708794 is a wasteful number, since it uses less digits than its factorization.

66708794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33354399.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 66708794 is about 8167.5451636339. The cubic root of 66708794 is about 405.5655240379.

The spelling of 66708794 in words is "sixty-six million, seven hundred eight thousand, seven hundred ninety-four".