66022265 has 4 divisors (see below), whose sum is σ = 79226724. Its totient is φ = 52817808.

The previous prime is 66022211. The next prime is 66022273. The reversal of 66022265 is 56222066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56222066 = 2 ⋅28111033.

It can be written as a sum of positive squares in 2 ways, for example, as 40246336 + 25775929 = 6344^2 + 5077^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66022265 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6602222 + ... + 6602231.

It is an arithmetic number, because the mean of its divisors is an integer number (19806681).

Almost surely, 2^66022265 is an apocalyptic number.

It is an amenable number.

66022265 is a deficient number, since it is larger than the sum of its proper divisors (13204459).

66022265 is a wasteful number, since it uses less digits than its factorization.

66022265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13204458.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 66022265 is about 8125.4086051103. The cubic root of 66022265 is about 404.1694404930.

The spelling of 66022265 in words is "sixty-six million, twenty-two thousand, two hundred sixty-five".