25206066 has 20 divisors (see below), whose sum is σ = 56480622. Its totient is φ = 8401968.

The previous prime is 25206061. The next prime is 25206067. The reversal of 25206066 is 66060252.

25206066 is a `hidden beast` number, since 2 + 52 + 0 + 606 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24059025 + 1147041 = 4905^2 + 1071^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (25206061) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 77635 + ... + 77958.

Almost surely, 2^25206066 is an apocalyptic number.

25206066 is an abundant number, since it is smaller than the sum of its proper divisors (31274556).

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

25206066 is a wasteful number, since it uses less digits than its factorization.

25206066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155607 (or 155598 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 25206066 is about 5020.5643109117. The cubic root of 25206066 is about 293.2029640483.

The spelling of 25206066 in words is "twenty-five million, two hundred six thousand, sixty-six".