66706803 has 24 divisors (see below), whose sum is σ = 99667568. Its totient is φ = 42964992.

The previous prime is 66706799. The next prime is 66706811. The reversal of 66706803 is 30860766.

It is a happy number.

It is not a de Polignac number, because 66706803 - 2² = 66706799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66706603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36651 + ... + 38427.

Almost surely, 2^66706803 is an apocalyptic number.

66706803 is a deficient number, since it is larger than the sum of its proper divisors (32960765).

66706803 is a wasteful number, since it uses less digits than its factorization.

66706803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923 (or 1920 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 66706803 is about 8167.4232778766. The cubic root of 66706803 is about 405.5614891426.

The spelling of 66706803 in words is "sixty-six million, seven hundred six thousand, eight hundred three".