66307685 has 8 divisors (see below), whose sum is σ = 79664256. Its totient is φ = 52982800.

The previous prime is 66307679. The next prime is 66307687. The reversal of 66307685 is 58670366.

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

It is a de Polignac number, because none of the positive numbers 2^k-66307685 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 (66307687) 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, 3041 + ... + 11910.

It is an arithmetic number, because the mean of its divisors is an integer number (9958032).

Almost surely, 2^66307685 is an apocalyptic number.

It is an amenable number.

66307685 is a deficient number, since it is larger than the sum of its proper divisors (13356571).

66307685 is a wasteful number, since it uses less digits than its factorization.

66307685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15843.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 66307685 is about 8142.9530884072. The cubic root of 66307685 is about 404.7510231127.

The spelling of 66307685 in words is "sixty-six million, three hundred seven thousand, six hundred eighty-five".