66490343 has 4 divisors (see below), whose sum is σ = 66783480. Its totient is φ = 66197208.

The previous prime is 66490339. The next prime is 66490357. The reversal of 66490343 is 34309466.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34309466 = 2 ⋅17154733.

It is a cyclic number.

It is not a de Polignac number, because 66490343 - 2² = 66490339 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66490393) 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, 146228 + ... + 146681.

It is an arithmetic number, because the mean of its divisors is an integer number (16695870).

Almost surely, 2^66490343 is an apocalyptic number.

66490343 is a deficient number, since it is larger than the sum of its proper divisors (293137).

66490343 is a wasteful number, since it uses less digits than its factorization.

66490343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293136.

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 66490343 is about 8154.1610849921. The cubic root of 66490343 is about 405.1223386954.

The spelling of 66490343 in words is "sixty-six million, four hundred ninety thousand, three hundred forty-three".