25122664266 has 48 divisors (see below), whose sum is σ = 59152905504. Its totient is φ = 7091416416.

The previous prime is 25122664261. The next prime is 25122664267. The reversal of 25122664266 is 66246622152.

It is a super-2 number, since 2×25122664266² (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).

It is not an unprimeable number, because it can be changed into a prime (25122664261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 490365 + ... + 539168.

It is an arithmetic number, because the mean of its divisors is an integer number (1232352198).

Almost surely, 2^25122664266 is an apocalyptic number.

25122664266 is an abundant number, since it is smaller than the sum of its proper divisors (34030241238).

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

25122664266 is a wasteful number, since it uses less digits than its factorization.

25122664266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029635 (or 1029628 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The spelling of 25122664266 in words is "twenty-five billion, one hundred twenty-two million, six hundred sixty-four thousand, two hundred sixty-six".