66340571 has 8 divisors (see below), whose sum is σ = 76180800. Its totient is φ = 57135240.

The previous prime is 66340567. The next prime is 66340591. The reversal of 66340571 is 17504366.

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

It is a cyclic number.

It is not a de Polignac number, because 66340571 - 2² = 66340567 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66340591) 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, 158501 + ... + 158918.

It is an arithmetic number, because the mean of its divisors is an integer number (9522600).

Almost surely, 2^66340571 is an apocalyptic number.

66340571 is a deficient number, since it is larger than the sum of its proper divisors (9840229).

66340571 is a wasteful number, since it uses less digits than its factorization.

66340571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317449.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 66340571 is about 8144.9721300935. The cubic root of 66340571 is about 404.8179255753.

The spelling of 66340571 in words is "sixty-six million, three hundred forty thousand, five hundred seventy-one".