66703807 has 8 divisors (see below), whose sum is σ = 68144400. Its totient is φ = 65273664.

The previous prime is 66703789. The next prime is 66703811. The reversal of 66703807 is 70830766.

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 66703807 - 2¹⁵ = 66671039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66703867) 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 7 ways as a sum of consecutive naturals, for example, 11043 + ... + 15979.

It is an arithmetic number, because the mean of its divisors is an integer number (8518050).

Almost surely, 2^66703807 is an apocalyptic number.

66703807 is a deficient number, since it is larger than the sum of its proper divisors (1440593).

66703807 is a wasteful number, since it uses less digits than its factorization.

66703807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5225.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 66703807 is about 8167.2398642381. The cubic root of 66703807 is about 405.5554173960. Note that the first 3 decimals are identical.

The spelling of 66703807 in words is "sixty-six million, seven hundred three thousand, eight hundred seven".