66112811245 has 8 divisors (see below), whose sum is σ = 85438094616. Its totient is φ = 48821768256.

The previous prime is 66112811239. The next prime is 66112811279. The reversal of 66112811245 is 54211821166.

It can be written as a sum of positive squares in 4 ways, for example, as 1912400361 + 64200410884 = 43731^2 + 253378^2 .

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 66112811245 - 2⁵ = 66112811213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 508560022 + ... + 508560151.

It is an arithmetic number, because the mean of its divisors is an integer number (10679761827).

Almost surely, 2^66112811245 is an apocalyptic number.

66112811245 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66112811245 is a deficient number, since it is larger than the sum of its proper divisors (19325283371).

66112811245 is a wasteful number, since it uses less digits than its factorization.

66112811245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017120191.

The product of its digits is 23040, while the sum is 37.

The spelling of 66112811245 in words is "sixty-six billion, one hundred twelve million, eight hundred eleven thousand, two hundred forty-five".