25162722666 has 24 divisors (see below), whose sum is σ = 55679217984. Its totient is φ = 8209114920.

The previous prime is 25162722653. The next prime is 25162722667. The reversal of 25162722666 is 66622726152.

It is a super-2 number, since 2×25162722666² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25162722667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14870740 + ... + 14872431.

It is an arithmetic number, because the mean of its divisors is an integer number (2319967416).

Almost surely, 2^25162722666 is an apocalyptic number.

25162722666 is an abundant number, since it is smaller than the sum of its proper divisors (30516495318).

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

25162722666 is a wasteful number, since it uses less digits than its factorization.

25162722666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29743226 (or 29743223 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The spelling of 25162722666 in words is "twenty-five billion, one hundred sixty-two million, seven hundred twenty-two thousand, six hundred sixty-six".