66585723 has 4 divisors (see below), whose sum is σ = 88780968. Its totient is φ = 44390480.

The previous prime is 66585707. The next prime is 66585731. The reversal of 66585723 is 32758566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66585723 - 2⁴ = 66585707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66585773) 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, 11097618 + ... + 11097623.

It is an arithmetic number, because the mean of its divisors is an integer number (22195242).

Almost surely, 2^66585723 is an apocalyptic number.

66585723 is a deficient number, since it is larger than the sum of its proper divisors (22195245).

66585723 is a wasteful number, since it uses less digits than its factorization.

66585723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22195244.

The product of its digits is 302400, while the sum is 42.

The square root of 66585723 is about 8160.0075367612. The cubic root of 66585723 is about 405.3159613333.

The spelling of 66585723 in words is "sixty-six million, five hundred eighty-five thousand, seven hundred twenty-three".