66100766611 has 4 divisors (see below), whose sum is σ = 72109927224. Its totient is φ = 60091606000.

The previous prime is 66100766609. The next prime is 66100766629. The reversal of 66100766611 is 11666700166.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66100766611 - 2¹ = 66100766609 is a prime.

It is a super-2 number, since 2×66100766611² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66100766651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3004580290 + ... + 3004580311.

It is an arithmetic number, because the mean of its divisors is an integer number (18027481806).

Almost surely, 2^66100766611 is an apocalyptic number.

66100766611 is a deficient number, since it is larger than the sum of its proper divisors (6009160613).

66100766611 is a wasteful number, since it uses less digits than its factorization.

66100766611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6009160612.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 66100766611 in words is "sixty-six billion, one hundred million, seven hundred sixty-six thousand, six hundred eleven".