43661606 has 4 divisors (see below), whose sum is σ = 65492412. Its totient is φ = 21830802.

The previous prime is 43661603. The next prime is 43661633. The reversal of 43661606 is 60616634.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43661603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10915400 + ... + 10915403.

It is an arithmetic number, because the mean of its divisors is an integer number (16373103).

Almost surely, 2^43661606 is an apocalyptic number.

43661606 is a deficient number, since it is larger than the sum of its proper divisors (21830806).

43661606 is a wasteful number, since it uses less digits than its factorization.

43661606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21830805.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 43661606 is about 6607.6929408077. The cubic root of 43661606 is about 352.1274665341.

The spelling of 43661606 in words is "forty-three million, six hundred sixty-one thousand, six hundred six".