66285031528391 has 16 divisors (see below), whose sum is σ = 73014329211264. Its totient is φ = 59792642402304.

The previous prime is 66285031528367. The next prime is 66285031528393. The reversal of 66285031528391 is 19382513058266.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66285031528391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66285031528391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66285031528393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82668506 + ... + 83466471.

It is an arithmetic number, because the mean of its divisors is an integer number (4563395575704).

Almost surely, 2^{66285031528391} is an apocalyptic number.

66285031528391 is a deficient number, since it is larger than the sum of its proper divisors (6729297682873).

66285031528391 is a wasteful number, since it uses less digits than its factorization.

66285031528391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166135690.

The product of its (nonzero) digits is 18662400, while the sum is 59.

The spelling of 66285031528391 in words is "sixty-six trillion, two hundred eighty-five billion, thirty-one million, five hundred twenty-eight thousand, three hundred ninety-one".