25203100066 has 16 divisors (see below), whose sum is σ = 40032131256. Its totient is φ = 11859192576.

The previous prime is 25203100003. The next prime is 25203100073. The reversal of 25203100066 is 66000130252.

It can be written as a sum of positive squares in 4 ways, for example, as 23791520025 + 1411580041 = 154245^2 + 37571^2 .

It is a super-3 number, since 3×25203100066³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25203100066.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435040 + ... + 489556.

Almost surely, 2^25203100066 is an apocalyptic number.

25203100066 is a deficient number, since it is larger than the sum of its proper divisors (14829031190).

25203100066 is a wasteful number, since it uses less digits than its factorization.

25203100066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68133.

The product of its (nonzero) digits is 2160, while the sum is 25.

The spelling of 25203100066 in words is "twenty-five billion, two hundred three million, one hundred thousand, sixty-six".