25662340206 has 48 divisors (see below), whose sum is σ = 59890821120. Its totient is φ = 7918249680.

The previous prime is 25662340159. The next prime is 25662340219. The reversal of 25662340206 is 60204326652.

25662340206 is a `hidden beast` number, since 2 + 5 + 6 + 623 + 4 + 0 + 20 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 986946 + ... + 1012613.

It is an arithmetic number, because the mean of its divisors is an integer number (1247725440).

Almost surely, 2^25662340206 is an apocalyptic number.

25662340206 is an abundant number, since it is smaller than the sum of its proper divisors (34228480914).

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

25662340206 is a wasteful number, since it uses less digits than its factorization.

25662340206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999621 (or 1999618 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

Adding to 25662340206 its reverse (60204326652), we get a palindrome (85866666858).

The spelling of 25662340206 in words is "twenty-five billion, six hundred sixty-two million, three hundred forty thousand, two hundred six".