66443351 has 8 divisors (see below), whose sum is σ = 72293424. Its totient is φ = 60698880.

The previous prime is 66443341. The next prime is 66443357. The reversal of 66443351 is 15334466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66443351 - 2⁶ = 66443287 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 (66443357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25085 + ... + 27606.

It is an arithmetic number, because the mean of its divisors is an integer number (9036678).

Almost surely, 2^66443351 is an apocalyptic number.

66443351 is a deficient number, since it is larger than the sum of its proper divisors (5850073).

66443351 is a wasteful number, since it uses less digits than its factorization.

66443351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52801.

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

The square root of 66443351 is about 8151.2791020796. The cubic root of 66443351 is about 405.0268762330.

The spelling of 66443351 in words is "sixty-six million, four hundred forty-three thousand, three hundred fifty-one".