43303666640 has 40 divisors (see below), whose sum is σ = 108425721768. Its totient is φ = 15989045760.

The previous prime is 43303666639. The next prime is 43303666733. The reversal of 43303666640 is 4666630334.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9709456 + 43293957184 = 3116^2 + 208072^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20818031 + ... + 20820110.

Almost surely, 2^43303666640 is an apocalyptic number.

43303666640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43303666640 is an abundant number, since it is smaller than the sum of its proper divisors (65122055128).

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

43303666640 is a wasteful number, since it uses less digits than its factorization.

43303666640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41638167 (or 41638161 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 41.

The spelling of 43303666640 in words is "forty-three billion, three hundred three million, six hundred sixty-six thousand, six hundred forty".