25653162066 has 16 divisors (see below), whose sum is σ = 58635799104. Its totient is φ = 7329474864.

The previous prime is 25653162049. The next prime is 25653162071. The reversal of 25653162066 is 66026135652.

It is a super-2 number, since 2×25653162066² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 610789573 = 25653162066 / (2 + 5 + 6 + 5 + 3 + 1 + 6 + 2 + 0 + 6 + 6).

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, 305394745 + ... + 305394828.

It is an arithmetic number, because the mean of its divisors is an integer number (3664737444).

Almost surely, 2^25653162066 is an apocalyptic number.

25653162066 is an abundant number, since it is smaller than the sum of its proper divisors (32982637038).

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

25653162066 is a wasteful number, since it uses less digits than its factorization.

25653162066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610789585.

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 25653162066 in words is "twenty-five billion, six hundred fifty-three million, one hundred sixty-two thousand, sixty-six".