64660571 has 12 divisors (see below), whose sum is σ = 70555968. Its totient is φ = 59202432.

The previous prime is 64660559. The next prime is 64660577. The reversal of 64660571 is 17506646.

It is not a de Polignac number, because 64660571 - 2¹⁰ = 64659547 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64660577) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7670 + ... + 13716.

It is an arithmetic number, because the mean of its divisors is an integer number (5879664).

Almost surely, 2^64660571 is an apocalyptic number.

64660571 is a deficient number, since it is larger than the sum of its proper divisors (5895397).

64660571 is a wasteful number, since it uses less digits than its factorization.

64660571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6118 (or 6101 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 64660571 is about 8041.1797020089. The cubic root of 64660571 is about 401.3714818031.

The spelling of 64660571 in words is "sixty-four million, six hundred sixty thousand, five hundred seventy-one".