66223507611 has 16 divisors (see below), whose sum is σ = 95943511040. Its totient is φ = 40476166560.

The previous prime is 66223507547. The next prime is 66223507657. The reversal of 66223507611 is 11670532266.

It is not a de Polignac number, because 66223507611 - 2⁶ = 66223507547 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66223507611.

It is not an unprimeable number, because it can be changed into a prime (66223507661) 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, 18737200 + ... + 18740733.

It is an arithmetic number, because the mean of its divisors is an integer number (5996469440).

Almost surely, 2^66223507611 is an apocalyptic number.

66223507611 is a deficient number, since it is larger than the sum of its proper divisors (29720003429).

66223507611 is a wasteful number, since it uses less digits than its factorization.

66223507611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37477986.

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 66223507611 in words is "sixty-six billion, two hundred twenty-three million, five hundred seven thousand, six hundred eleven".