66351443 has 4 divisors (see below), whose sum is σ = 66406320. Its totient is φ = 66296568.

The previous prime is 66351437. The next prime is 66351463. The reversal of 66351443 is 34415366.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66351443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66351413) 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, 25583 + ... + 28056.

It is an arithmetic number, because the mean of its divisors is an integer number (16601580).

Almost surely, 2^66351443 is an apocalyptic number.

66351443 is a deficient number, since it is larger than the sum of its proper divisors (54877).

66351443 is a wasteful number, since it uses less digits than its factorization.

66351443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54876.

The product of its digits is 25920, while the sum is 32.

The square root of 66351443 is about 8145.6395083505. The cubic root of 66351443 is about 404.8400384393.

The spelling of 66351443 in words is "sixty-six million, three hundred fifty-one thousand, four hundred forty-three".