25566426 has 12 divisors (see below), whose sum is σ = 55393962. Its totient is φ = 8522136.

The previous prime is 25566389. The next prime is 25566427. The reversal of 25566426 is 62466552.

25566426 is a `hidden beast` number, since 2 + 5 + 5 + 6 + 642 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24354225 + 1212201 = 4935^2 + 1101^2 .

It is not an unprimeable number, because it can be changed into a prime (25566427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 710161 + ... + 710196.

Almost surely, 2^25566426 is an apocalyptic number.

25566426 is an abundant number, since it is smaller than the sum of its proper divisors (29827536).

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

25566426 is a wasteful number, since it uses less digits than its factorization.

25566426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420365 (or 1420362 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 25566426 is about 5056.3253455449. The cubic root of 25566426 is about 294.5936221991.

The spelling of 25566426 in words is "twenty-five million, five hundred sixty-six thousand, four hundred twenty-six".