66724093 has 4 divisors (see below), whose sum is σ = 66740800. Its totient is φ = 66707388.

The previous prime is 66724079. The next prime is 66724109. The reversal of 66724093 is 39042766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66724093 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 (66724033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1558 + ... + 11656.

It is an arithmetic number, because the mean of its divisors is an integer number (16685200).

Almost surely, 2^66724093 is an apocalyptic number.

It is an amenable number.

66724093 is a deficient number, since it is larger than the sum of its proper divisors (16707).

66724093 is a wasteful number, since it uses less digits than its factorization.

66724093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16706.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 66724093 is about 8168.4816826629. The cubic root of 66724093 is about 405.5965258110.

The spelling of 66724093 in words is "sixty-six million, seven hundred twenty-four thousand, ninety-three".