66225841 has 6 divisors (see below), whose sum is σ = 72793826. Its totient is φ = 60205200.

The previous prime is 66225839. The next prime is 66225847. The reversal of 66225841 is 14852266.

It can be written as a sum of positive squares in only one way, i.e., 65545216 + 680625 = 8096^2 + 825^2 .

It is not a de Polignac number, because 66225841 - 2¹ = 66225839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66225797 and 66225806.

It is not an unprimeable number, because it can be changed into a prime (66225847) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 273540 + ... + 273781.

Almost surely, 2^66225841 is an apocalyptic number.

It is an amenable number.

66225841 is a deficient number, since it is larger than the sum of its proper divisors (6567985).

66225841 is a wasteful number, since it uses less digits than its factorization.

66225841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547343 (or 547332 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 66225841 is about 8137.9260871551. The cubic root of 66225841 is about 404.5844256237.

It can be divided in two parts, 6 and 6225841, that multiplied together give a triangular number (37355046 = T₈₆₄₃).

The spelling of 66225841 in words is "sixty-six million, two hundred twenty-five thousand, eight hundred forty-one".