66785858703 has 24 divisors (see below), whose sum is σ = 98923655376. Its totient is φ = 43392988800.

The previous prime is 66785858683. The next prime is 66785858837. The reversal of 66785858703 is 30785858766.

It is not a de Polignac number, because 66785858703 - 2⁶ = 66785858639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66785858203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 265101 + ... + 451497.

It is an arithmetic number, because the mean of its divisors is an integer number (4121818974).

Almost surely, 2^66785858703 is an apocalyptic number.

66785858703 is a deficient number, since it is larger than the sum of its proper divisors (32137796673).

66785858703 is a wasteful number, since it uses less digits than its factorization.

66785858703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187415 (or 187412 counting only the distinct ones).

The product of its (nonzero) digits is 67737600, while the sum is 63.

Adding to 66785858703 its sum of digits (63), we get a palindrome (66785858766).

The spelling of 66785858703 in words is "sixty-six billion, seven hundred eighty-five million, eight hundred fifty-eight thousand, seven hundred three".