66225565 has 16 divisors (see below), whose sum is σ = 92315520. Its totient is φ = 44665920.

The previous prime is 66225541. The next prime is 66225581. The reversal of 66225565 is 56552266.

It is not a de Polignac number, because 66225565 - 2⁹ = 66225053 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13375 + ... + 17644.

It is an arithmetic number, because the mean of its divisors is an integer number (5769720).

Almost surely, 2^66225565 is an apocalyptic number.

It is an amenable number.

66225565 is a deficient number, since it is larger than the sum of its proper divisors (26089955).

66225565 is a wasteful number, since it uses less digits than its factorization.

66225565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31092.

The product of its digits is 108000, while the sum is 37.

The square root of 66225565 is about 8137.9091295000. The cubic root of 66225565 is about 404.5838635799.

The spelling of 66225565 in words is "sixty-six million, two hundred twenty-five thousand, five hundred sixty-five".