66651001611 has 8 divisors (see below), whose sum is σ = 89683305360. Its totient is φ = 44026349472.

The previous prime is 66651001603. The next prime is 66651001663. The reversal of 66651001611 is 11610015666.

66651001611 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66651001611 - 2³ = 66651001603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66651001811) 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, 101912520 + ... + 101913173.

It is an arithmetic number, because the mean of its divisors is an integer number (11210413170).

Almost surely, 2^66651001611 is an apocalyptic number.

66651001611 is a deficient number, since it is larger than the sum of its proper divisors (23032303749).

66651001611 is a wasteful number, since it uses less digits than its factorization.

66651001611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203825805.

The product of its (nonzero) digits is 6480, while the sum is 33.

The spelling of 66651001611 in words is "sixty-six billion, six hundred fifty-one million, one thousand, six hundred eleven".