245640066 has 32 divisors (see below), whose sum is σ = 563407488. Its totient is φ = 69939840.

The previous prime is 245640053. The next prime is 245640071. The reversal of 245640066 is 660046542.

245640066 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×245640066³ (a number of 26 digits) contains 333 as substring.

It is a Curzon 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, 2326 + ... + 22286.

It is an arithmetic number, because the mean of its divisors is an integer number (17606484).

Almost surely, 2^245640066 is an apocalyptic number.

245640066 is an abundant number, since it is smaller than the sum of its proper divisors (317767422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245640066 is a wasteful number, since it uses less digits than its factorization.

245640066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20266.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 245640066 is about 15672.9086643163. The cubic root of 245640066 is about 626.2769124016.

The spelling of 245640066 in words is "two hundred forty-five million, six hundred forty thousand, sixty-six".