66600022 has 4 divisors (see below), whose sum is σ = 99900036. Its totient is φ = 33300010.

The previous prime is 66599989. The next prime is 66600029. The reversal of 66600022 is 22000666.

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

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66599966 and 66600002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66600029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16650004 + ... + 16650007.

It is an arithmetic number, because the mean of its divisors is an integer number (24975009).

Almost surely, 2^66600022 is an apocalyptic number.

66600022 is a deficient number, since it is larger than the sum of its proper divisors (33300014).

66600022 is a wasteful number, since it uses less digits than its factorization.

66600022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33300013.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 66600022 is about 8160.8836531346. The cubic root of 66600022 is about 405.3449725481.

Adding to 66600022 its reverse (22000666), we get a palindrome (88600688).

The spelling of 66600022 in words is "sixty-six million, six hundred thousand, twenty-two".