66001245 has 32 divisors (see below), whose sum is σ = 110833920. Its totient is φ = 33492480.

The previous prime is 66001217. The next prime is 66001249. The reversal of 66001245 is 54210066.

It is not a de Polignac number, because 66001245 - 2⁵ = 66001213 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66001249) 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 31 ways as a sum of consecutive naturals, for example, 29817 + ... + 31953.

It is an arithmetic number, because the mean of its divisors is an integer number (3463560).

Almost surely, 2^66001245 is an apocalyptic number.

It is an amenable number.

66001245 is a deficient number, since it is larger than the sum of its proper divisors (44832675).

66001245 is a wasteful number, since it uses less digits than its factorization.

66001245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2245.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 66001245 is about 8124.1150287277. The cubic root of 66001245 is about 404.1265431290.

The spelling of 66001245 in words is "sixty-six million, one thousand, two hundred forty-five".