66204043365 has 128 divisors (see below), whose sum is σ = 116702208000. Its totient is φ = 31933440000.

The previous prime is 66204043361. The next prime is 66204043369. The reversal of 66204043365 is 56334040266.

It is an interprime number because it is at equal distance from previous prime (66204043361) and next prime (66204043369).

It is not a de Polignac number, because 66204043365 - 2² = 66204043361 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66204043361) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 165097165 + ... + 165097565.

It is an arithmetic number, because the mean of its divisors is an integer number (911736000).

Almost surely, 2^66204043365 is an apocalyptic number.

It is an amenable number.

66204043365 is a deficient number, since it is larger than the sum of its proper divisors (50498164635).

66204043365 is a wasteful number, since it uses less digits than its factorization.

66204043365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739.

The product of its (nonzero) digits is 311040, while the sum is 39.

The spelling of 66204043365 in words is "sixty-six billion, two hundred four million, forty-three thousand, three hundred sixty-five".