25461312666 has 16 divisors (see below), whose sum is σ = 52164641088. Its totient is φ = 8280101600.

The previous prime is 25461312661. The next prime is 25461312683. The reversal of 25461312666 is 66621316452.

It is not an unprimeable number, because it can be changed into a prime (25461312661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51750390 + ... + 51750881.

It is an arithmetic number, because the mean of its divisors is an integer number (3260290068).

Almost surely, 2^25461312666 is an apocalyptic number.

25461312666 is an abundant number, since it is smaller than the sum of its proper divisors (26703328422).

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

25461312666 is a wasteful number, since it uses less digits than its factorization.

25461312666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103501317.

The product of its digits is 311040, while the sum is 42.

The spelling of 25461312666 in words is "twenty-five billion, four hundred sixty-one million, three hundred twelve thousand, six hundred sixty-six".