4224263521666 has 4 divisors (see below), whose sum is σ = 6336395282502. Its totient is φ = 2112131760832.

The previous prime is 4224263521661. The next prime is 4224263521691. The reversal of 4224263521666 is 6661253624224.

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

It can be written as a sum of positive squares in only one way, i.e., 2711031403441 + 1513232118225 = 1646521^2 + 1230135^2 .

It is not an unprimeable number, because it can be changed into a prime (4224263521661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056065880415 + ... + 1056065880418.

Almost surely, 2^{4224263521666} is an apocalyptic number.

4224263521666 is a deficient number, since it is larger than the sum of its proper divisors (2112131760836).

4224263521666 is a wasteful number, since it uses less digits than its factorization.

4224263521666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112131760835.

The product of its digits is 4976640, while the sum is 49.

The spelling of 4224263521666 in words is "four trillion, two hundred twenty-four billion, two hundred sixty-three million, five hundred twenty-one thousand, six hundred sixty-six".