66622011 has 4 divisors (see below), whose sum is σ = 88829352. Its totient is φ = 44414672.

The previous prime is 66622001. The next prime is 66622013. The reversal of 66622011 is 11022666.

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 66622011 - 2¹⁰ = 66620987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66622013) 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, 11103666 + ... + 11103671.

It is an arithmetic number, because the mean of its divisors is an integer number (22207338).

Almost surely, 2^66622011 is an apocalyptic number.

66622011 is a deficient number, since it is larger than the sum of its proper divisors (22207341).

66622011 is a wasteful number, since it uses less digits than its factorization.

66622011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22207340.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 66622011 is about 8162.2307612564. The cubic root of 66622011 is about 405.3895778879.

Adding to 66622011 its reverse (11022666), we get a palindrome (77644677).

The spelling of 66622011 in words is "sixty-six million, six hundred twenty-two thousand, eleven".