66236671 has 4 divisors (see below), whose sum is σ = 66403912. Its totient is φ = 66069432.

The previous prime is 66236663. The next prime is 66236707. The reversal of 66236671 is 17663266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17663266 = 2 ⋅8831633.

It is a cyclic number.

It is not a de Polignac number, because 66236671 - 2³ = 66236663 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66236671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66236371) 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, 83025 + ... + 83818.

It is an arithmetic number, because the mean of its divisors is an integer number (16600978).

Almost surely, 2^66236671 is an apocalyptic number.

66236671 is a deficient number, since it is larger than the sum of its proper divisors (167241).

66236671 is a wasteful number, since it uses less digits than its factorization.

66236671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167240.

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

The square root of 66236671 is about 8138.5914629007. The cubic root of 66236671 is about 404.6064784983.

The spelling of 66236671 in words is "sixty-six million, two hundred thirty-six thousand, six hundred seventy-one".