66385703 has 4 divisors (see below), whose sum is σ = 66632760. Its totient is φ = 66138648.

The previous prime is 66385681. The next prime is 66385717. The reversal of 66385703 is 30758366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66385703 - 2⁸ = 66385447 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 (66385763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123125 + ... + 123662.

It is an arithmetic number, because the mean of its divisors is an integer number (16658190).

Almost surely, 2^66385703 is an apocalyptic number.

66385703 is a deficient number, since it is larger than the sum of its proper divisors (247057).

66385703 is a wasteful number, since it uses less digits than its factorization.

66385703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247056.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 66385703 is about 8147.7422025982. The cubic root of 66385703 is about 404.9097050137.

The spelling of 66385703 in words is "sixty-six million, three hundred eighty-five thousand, seven hundred three".