66242145 has 16 divisors (see below), whose sum is σ = 108453312. Its totient is φ = 34507200.

The previous prime is 66242123. The next prime is 66242159. The reversal of 66242145 is 54124266.

It is not a de Polignac number, because 66242145 - 2¹² = 66238049 is a prime.

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, 50706 + ... + 51995.

It is an arithmetic number, because the mean of its divisors is an integer number (6778332).

Almost surely, 2^66242145 is an apocalyptic number.

It is an amenable number.

66242145 is a deficient number, since it is larger than the sum of its proper divisors (42211167).

66242145 is a wasteful number, since it uses less digits than its factorization.

66242145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102752.

The product of its digits is 11520, while the sum is 30.

The square root of 66242145 is about 8138.9277549318. The cubic root of 66242145 is about 404.6176241614.

The spelling of 66242145 in words is "sixty-six million, two hundred forty-two thousand, one hundred forty-five".