66225641 has 4 divisors (see below), whose sum is σ = 68361984. Its totient is φ = 64089300.

The previous prime is 66225631. The next prime is 66225667. The reversal of 66225641 is 14652266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66225641 - 2¹⁰ = 66224617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66225598 and 66225607.

It is not an unprimeable number, because it can be changed into a prime (66225631) 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, 1068125 + ... + 1068186.

It is an arithmetic number, because the mean of its divisors is an integer number (17090496).

Almost surely, 2^66225641 is an apocalyptic number.

It is an amenable number.

66225641 is a deficient number, since it is larger than the sum of its proper divisors (2136343).

66225641 is a wasteful number, since it uses less digits than its factorization.

66225641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136342.

The product of its digits is 17280, while the sum is 32.

The square root of 66225641 is about 8137.9137990028. The cubic root of 66225641 is about 404.5840183458.

It can be divided in two parts, 66225 and 641, that added together give a palindrome (66866).

The spelling of 66225641 in words is "sixty-six million, two hundred twenty-five thousand, six hundred forty-one".