66252145 has 16 divisors (see below), whose sum is σ = 88611840. Its totient is φ = 47257344.

The previous prime is 66252143. The next prime is 66252157. The reversal of 66252145 is 54125266.

It is a cyclic number.

It is not a de Polignac number, because 66252145 - 2¹ = 66252143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66252143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18897 + ... + 22126.

It is an arithmetic number, because the mean of its divisors is an integer number (5538240).

Almost surely, 2^66252145 is an apocalyptic number.

It is an amenable number.

66252145 is a deficient number, since it is larger than the sum of its proper divisors (22359695).

66252145 is a wasteful number, since it uses less digits than its factorization.

66252145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41064.

The product of its digits is 14400, while the sum is 31.

The square root of 66252145 is about 8139.5420632859. The cubic root of 66252145 is about 404.6379836704.

The spelling of 66252145 in words is "sixty-six million, two hundred fifty-two thousand, one hundred forty-five".