66364206620564 has 24 divisors (see below), whose sum is σ = 116608581135648. Its totient is φ = 33047488476000.

The previous prime is 66364206620563. The next prime is 66364206620567. The reversal of 66364206620564 is 46502660246366.

It is a super-3 number, since 3×66364206620564³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66364206620563) 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, 11369534 + ... + 16186250.

It is an arithmetic number, because the mean of its divisors is an integer number (4858690880652).

Almost surely, 2^{66364206620564} is an apocalyptic number.

It is an amenable number.

66364206620564 is a deficient number, since it is larger than the sum of its proper divisors (50244374515084).

66364206620564 is a wasteful number, since it uses less digits than its factorization.

66364206620564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4830695 (or 4830693 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 56.

The spelling of 66364206620564 in words is "sixty-six trillion, three hundred sixty-four billion, two hundred six million, six hundred twenty thousand, five hundred sixty-four".