66499248611 has 4 divisors (see below), whose sum is σ = 66512419224. Its totient is φ = 66486078000.

The previous prime is 66499248587. The next prime is 66499248659. The reversal of 66499248611 is 11684299466.

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 66499248611 - 2³⁴ = 49319379427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66499248691) 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, 6577730 + ... + 6587831.

It is an arithmetic number, because the mean of its divisors is an integer number (16628104806).

Almost surely, 2^66499248611 is an apocalyptic number.

66499248611 is a deficient number, since it is larger than the sum of its proper divisors (13170613).

66499248611 is a wasteful number, since it uses less digits than its factorization.

66499248611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13170612.

The product of its digits is 4478976, while the sum is 56.

The spelling of 66499248611 in words is "sixty-six billion, four hundred ninety-nine million, two hundred forty-eight thousand, six hundred eleven".