43665620133 has 16 divisors (see below), whose sum is σ = 58620356096. Its totient is φ = 28910831040.

The previous prime is 43665620107. The next prime is 43665620161. The reversal of 43665620133 is 33102656634.

43665620133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-43665620133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43665620091 and 43665620100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43665620233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 987723 + ... + 1030983.

It is an arithmetic number, because the mean of its divisors is an integer number (3663772256).

Almost surely, 2^43665620133 is an apocalyptic number.

It is an amenable number.

43665620133 is a deficient number, since it is larger than the sum of its proper divisors (14954735963).

43665620133 is a wasteful number, since it uses less digits than its factorization.

43665620133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45564.

The product of its (nonzero) digits is 233280, while the sum is 39.

The spelling of 43665620133 in words is "forty-three billion, six hundred sixty-five million, six hundred twenty thousand, one hundred thirty-three".