66464571 has 8 divisors (see below), whose sum is σ = 88957440. Its totient is φ = 44140712.

The previous prime is 66464551. The next prime is 66464581. The reversal of 66464571 is 17546466.

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 66464571 - 2⁵ = 66464539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66464501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41331 + ... + 42908.

It is an arithmetic number, because the mean of its divisors is an integer number (11119680).

Almost surely, 2^66464571 is an apocalyptic number.

66464571 is a deficient number, since it is larger than the sum of its proper divisors (22492869).

66464571 is a wasteful number, since it uses less digits than its factorization.

66464571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84505.

The product of its digits is 120960, while the sum is 39.

The square root of 66464571 is about 8152.5806343758. The cubic root of 66464571 is about 405.0699894283.

The spelling of 66464571 in words is "sixty-six million, four hundred sixty-four thousand, five hundred seventy-one".