66682693 has 8 divisors (see below), whose sum is σ = 83136960. Its totient is φ = 51960480.

The previous prime is 66682669. The next prime is 66682697. The reversal of 66682693 is 39628666.

It is a happy number.

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

It is not a de Polignac number, because 66682693 - 2⁹ = 66682181 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 (66682697) 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, 432928 + ... + 433081.

It is an arithmetic number, because the mean of its divisors is an integer number (10392120).

Almost surely, 2^66682693 is an apocalyptic number.

It is an amenable number.

66682693 is a deficient number, since it is larger than the sum of its proper divisors (16454267).

66682693 is a wasteful number, since it uses less digits than its factorization.

66682693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866027.

The product of its digits is 559872, while the sum is 46.

The square root of 66682693 is about 8165.9471587808. The cubic root of 66682693 is about 405.5126222338.

The spelling of 66682693 in words is "sixty-six million, six hundred eighty-two thousand, six hundred ninety-three".