66371371 has 4 divisors (see below), whose sum is σ = 72405144. Its totient is φ = 60337600.

The previous prime is 66371359. The next prime is 66371387. The reversal of 66371371 is 17317366.

It is a happy number.

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 66371371 - 2¹¹ = 66369323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66371321) 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, 3016870 + ... + 3016891.

It is an arithmetic number, because the mean of its divisors is an integer number (18101286).

Almost surely, 2^66371371 is an apocalyptic number.

66371371 is a deficient number, since it is larger than the sum of its proper divisors (6033773).

66371371 is a wasteful number, since it uses less digits than its factorization.

66371371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6033772.

The product of its digits is 15876, while the sum is 34.

The square root of 66371371 is about 8146.8626476700. The cubic root of 66371371 is about 404.8805642836.

It can be divided in two parts, 6637 and 1371, that added together give a palindrome (8008).

The spelling of 66371371 in words is "sixty-six million, three hundred seventy-one thousand, three hundred seventy-one".