66630111 has 8 divisors (see below), whose sum is σ = 89626800. Its totient is φ = 44026752.

The previous prime is 66630107. The next prime is 66630121. The reversal of 66630111 is 11103666.

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

It is not a de Polignac number, because 66630111 - 2² = 66630107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66630121) 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, 97936 + ... + 98613.

It is an arithmetic number, because the mean of its divisors is an integer number (11203350).

Almost surely, 2^66630111 is an apocalyptic number.

66630111 is a deficient number, since it is larger than the sum of its proper divisors (22996689).

66630111 is a wasteful number, since it uses less digits than its factorization.

66630111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196665.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 66630111 is about 8162.7269340583. The cubic root of 66630111 is about 405.4060065049.

Adding to 66630111 its reverse (11103666), we get a palindrome (77733777).

The spelling of 66630111 in words is "sixty-six million, six hundred thirty thousand, one hundred eleven".