43243431666 has 16 divisors (see below), whose sum is σ = 86491301088. Its totient is φ = 14413737600.

The previous prime is 43243431661. The next prime is 43243431697. The reversal of 43243431666 is 66613434234.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (43243431661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50740 + ... + 298431.

It is an arithmetic number, because the mean of its divisors is an integer number (5405706318).

Almost surely, 2^43243431666 is an apocalyptic number.

43243431666 is an abundant number, since it is smaller than the sum of its proper divisors (43247869422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43243431666 is a wasteful number, since it uses less digits than its factorization.

43243431666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369817.

The product of its digits is 746496, while the sum is 42.

The spelling of 43243431666 in words is "forty-three billion, two hundred forty-three million, four hundred thirty-one thousand, six hundred sixty-six".