66630122 has 16 divisors (see below), whose sum is σ = 107823912. Its totient is φ = 30697920.

The previous prime is 66630121. The next prime is 66630181. The reversal of 66630122 is 22103666.

It can be written as a sum of positive squares in 4 ways, for example, as 47872561 + 18757561 = 6919^2 + 4331^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 66630091 and 66630100.

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, 15248 + ... + 19124.

Almost surely, 2^66630122 is an apocalyptic number.

66630122 is a deficient number, since it is larger than the sum of its proper divisors (41193790).

66630122 is a wasteful number, since it uses less digits than its factorization.

66630122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4553.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 66630122 is about 8162.7276078527. The cubic root of 66630122 is about 405.4060288145.

Adding to 66630122 its reverse (22103666), we get a palindrome (88733788).

The spelling of 66630122 in words is "sixty-six million, six hundred thirty thousand, one hundred twenty-two".