64966072571 has 16 divisors (see below), whose sum is σ = 69639820800. Its totient is φ = 60491497248.

The previous prime is 64966072553. The next prime is 64966072621. The reversal of 64966072571 is 17527066946.

It is a cyclic number.

It is not a de Polignac number, because 64966072571 - 2¹⁴ = 64966056187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64966072511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231221 + ... + 428246.

It is an arithmetic number, because the mean of its divisors is an integer number (4352488800).

Almost surely, 2^64966072571 is an apocalyptic number.

64966072571 is a deficient number, since it is larger than the sum of its proper divisors (4673748229).

64966072571 is a wasteful number, since it uses less digits than its factorization.

64966072571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659618.

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 64966072571 in words is "sixty-four billion, nine hundred sixty-six million, seventy-two thousand, five hundred seventy-one".