68661443 has 4 divisors (see below), whose sum is σ = 68916960. Its totient is φ = 68405928.

The previous prime is 68661433. The next prime is 68661449. The reversal of 68661443 is 34416686.

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

It is a cyclic number.

It is not a de Polignac number, because 68661443 - 2²⁴ = 51884227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68661397 and 68661406.

It is not an unprimeable number, because it can be changed into a prime (68661449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127355 + ... + 127892.

It is an arithmetic number, because the mean of its divisors is an integer number (17229240).

Almost surely, 2^68661443 is an apocalyptic number.

68661443 is a deficient number, since it is larger than the sum of its proper divisors (255517).

68661443 is a wasteful number, since it uses less digits than its factorization.

68661443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255516.

The product of its digits is 82944, while the sum is 38.

The square root of 68661443 is about 8286.2200670752. The cubic root of 68661443 is about 409.4846648530.

The spelling of 68661443 in words is "sixty-eight million, six hundred sixty-one thousand, four hundred forty-three".