43660161 has 8 divisors (see below), whose sum is σ = 64681760. Its totient is φ = 29106756.

The previous prime is 43660151. The next prime is 43660171. The reversal of 43660161 is 16106634.

It is an interprime number because it is at equal distance from previous prime (43660151) and next prime (43660171).

It is not a de Polignac number, because 43660161 - 2¹⁵ = 43627393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1617043 = 43660161 / (4 + 3 + 6 + 6 + 0 + 1 + 6 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43660151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 808495 + ... + 808548.

It is an arithmetic number, because the mean of its divisors is an integer number (8085220).

Almost surely, 2^43660161 is an apocalyptic number.

It is an amenable number.

43660161 is a deficient number, since it is larger than the sum of its proper divisors (21021599).

43660161 is a wasteful number, since it uses less digits than its factorization.

43660161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1617052 (or 1617046 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 43660161 is about 6607.5835976550. The cubic root of 43660161 is about 352.1235818870.

Adding to 43660161 its reverse (16106634), we get a palindrome (59766795).

The spelling of 43660161 in words is "forty-three million, six hundred sixty thousand, one hundred sixty-one".