66724345 has 8 divisors (see below), whose sum is σ = 80280576. Its totient is φ = 53238576.

The previous prime is 66724321. The next prime is 66724351. The reversal of 66724345 is 54342766.

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-66724345 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15507 + ... + 19336.

It is an arithmetic number, because the mean of its divisors is an integer number (10035072).

Almost surely, 2^66724345 is an apocalyptic number.

It is an amenable number.

66724345 is a deficient number, since it is larger than the sum of its proper divisors (13556231).

66724345 is a wasteful number, since it uses less digits than its factorization.

66724345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35231.

The product of its digits is 120960, while the sum is 37.

The square root of 66724345 is about 8168.4971077916. The cubic root of 66724345 is about 405.5970364221.

The spelling of 66724345 in words is "sixty-six million, seven hundred twenty-four thousand, three hundred forty-five".