66611107 has 4 divisors (see below), whose sum is σ = 66904776. Its totient is φ = 66317440.

The previous prime is 66611087. The next prime is 66611143. The reversal of 66611107 is 70111666.

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 66611107 - 2¹⁵ = 66578339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66617107) 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, 146494 + ... + 146947.

It is an arithmetic number, because the mean of its divisors is an integer number (16726194).

Almost surely, 2^66611107 is an apocalyptic number.

66611107 is a deficient number, since it is larger than the sum of its proper divisors (293669).

66611107 is a wasteful number, since it uses less digits than its factorization.

66611107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293668.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 66611107 is about 8161.5627792721. The cubic root of 66611107 is about 405.3674600269.

The spelling of 66611107 in words is "sixty-six million, six hundred eleven thousand, one hundred seven".