66909343 has 4 divisors (see below), whose sum is σ = 67096080. Its totient is φ = 66722608.

The previous prime is 66909329. The next prime is 66909361. The reversal of 66909343 is 34390966.

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 66909343 - 2²¹ = 64812191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66909296 and 66909305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66909383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92830 + ... + 93547.

It is an arithmetic number, because the mean of its divisors is an integer number (16774020).

Almost surely, 2^66909343 is an apocalyptic number.

66909343 is a deficient number, since it is larger than the sum of its proper divisors (186737).

66909343 is a wasteful number, since it uses less digits than its factorization.

66909343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186736.

The product of its (nonzero) digits is 104976, while the sum is 40.

The square root of 66909343 is about 8179.8131396750. The cubic root of 66909343 is about 405.9715394158.

The spelling of 66909343 in words is "sixty-six million, nine hundred nine thousand, three hundred forty-three".