66431754043 has 4 divisors (see below), whose sum is σ = 66432349368. Its totient is φ = 66431158720.

The previous prime is 66431753989. The next prime is 66431754127. The reversal of 66431754043 is 34045713466.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66431754043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66431754143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74518 + ... + 372043.

It is an arithmetic number, because the mean of its divisors is an integer number (16608087342).

Almost surely, 2^66431754043 is an apocalyptic number.

66431754043 is a deficient number, since it is larger than the sum of its proper divisors (595325).

66431754043 is a wasteful number, since it uses less digits than its factorization.

66431754043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595324.

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 66431754043 in words is "sixty-six billion, four hundred thirty-one million, seven hundred fifty-four thousand, forty-three".