25666610894316 has 120 divisors (see below), whose sum is σ = 76830148666656. Its totient is φ = 7319241596160.

The previous prime is 25666610894311. The next prime is 25666610894347. The reversal of 25666610894316 is 61349801666652.

It is a super-2 number, since 2×25666610894316² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (25666610894311) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9679071 + ... + 12042326.

Almost surely, 2^{25666610894316} is an apocalyptic number.

It is an amenable number.

25666610894316 is an abundant number, since it is smaller than the sum of its proper divisors (51163537772340).

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

25666610894316 is a wasteful number, since it uses less digits than its factorization.

25666610894316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21721941 (or 21721930 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 63.

The spelling of 25666610894316 in words is "twenty-five trillion, six hundred sixty-six billion, six hundred ten million, eight hundred ninety-four thousand, three hundred sixteen".