66339247 has 8 divisors (see below), whose sum is σ = 71872416. Its totient is φ = 60867552.

The previous prime is 66339233. The next prime is 66339281. The reversal of 66339247 is 74293366.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66339247 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 (66339227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13108 + ... + 17449.

It is an arithmetic number, because the mean of its divisors is an integer number (8984052).

Almost surely, 2^66339247 is an apocalyptic number.

66339247 is a deficient number, since it is larger than the sum of its proper divisors (5533169).

66339247 is a wasteful number, since it uses less digits than its factorization.

66339247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30737.

The product of its digits is 163296, while the sum is 40.

The square root of 66339247 is about 8144.8908525529. The cubic root of 66339247 is about 404.8152324897.

The spelling of 66339247 in words is "sixty-six million, three hundred thirty-nine thousand, two hundred forty-seven".