66225601 has 8 divisors (see below), whose sum is σ = 72013760. Its totient is φ = 60536592.

The previous prime is 66225587. The next prime is 66225613. The reversal of 66225601 is 10652266.

66225601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 66225601 - 2¹⁷ = 66094529 is a prime.

It is a super-2 number, since 2×66225601² = 8771660455622402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66225601.

It is not an unprimeable number, because it can be changed into a prime (66225631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23391 + ... + 26068.

It is an arithmetic number, because the mean of its divisors is an integer number (9001720).

Almost surely, 2^66225601 is an apocalyptic number.

It is an amenable number.

66225601 is a deficient number, since it is larger than the sum of its proper divisors (5788159).

66225601 is a wasteful number, since it uses less digits than its factorization.

66225601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49575.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 66225601 is about 8137.9113413701. The cubic root of 66225601 is about 404.5839368901.

Adding to 66225601 its reverse (10652266), we get a palindrome (76877867).

The spelling of 66225601 in words is "sixty-six million, two hundred twenty-five thousand, six hundred one".