66186831043 has 4 divisors (see below), whose sum is σ = 66219293520. Its totient is φ = 66154368568.

The previous prime is 66186831023. The next prime is 66186831083. The reversal of 66186831043 is 34013868166.

66186831043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 66186831043 - 2¹³ = 66186822851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66186830984 and 66186831002.

It is not an unprimeable number, because it can be changed into a prime (66186831023) 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, 16228180 + ... + 16232257.

It is an arithmetic number, because the mean of its divisors is an integer number (16554823380).

Almost surely, 2^66186831043 is an apocalyptic number.

66186831043 is a deficient number, since it is larger than the sum of its proper divisors (32462477).

66186831043 is a wasteful number, since it uses less digits than its factorization.

66186831043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32462476.

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 66186831043 in words is "sixty-six billion, one hundred eighty-six million, eight hundred thirty-one thousand, forty-three".