66204345311 has 16 divisors (see below), whose sum is σ = 73867701600. Its totient is φ = 58914645888.

The previous prime is 66204345299. The next prime is 66204345373. The reversal of 66204345311 is 11354340266.

It is a cyclic number.

It is not a de Polignac number, because 66204345311 - 2²² = 66200151007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66200345311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115205 + ... + 381681.

It is an arithmetic number, because the mean of its divisors is an integer number (4616731350).

Almost surely, 2^66204345311 is an apocalyptic number.

66204345311 is a deficient number, since it is larger than the sum of its proper divisors (7663356289).

66204345311 is a wasteful number, since it uses less digits than its factorization.

66204345311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267178.

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 66204345311 its reverse (11354340266), we get a palindrome (77558685577).

The spelling of 66204345311 in words is "sixty-six billion, two hundred four million, three hundred forty-five thousand, three hundred eleven".