25491066 has 16 divisors (see below), whose sum is σ = 51060000. Its totient is φ = 8484048.

The previous prime is 25491019. The next prime is 25491079. The reversal of 25491066 is 66019452.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1560 + ... + 7308.

It is an arithmetic number, because the mean of its divisors is an integer number (3191250).

Almost surely, 2^25491066 is an apocalyptic number.

25491066 is an abundant number, since it is smaller than the sum of its proper divisors (25568934).

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

25491066 is a wasteful number, since it uses less digits than its factorization.

25491066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6493.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 25491066 is about 5048.8677938722. The cubic root of 25491066 is about 294.3038877367.

The spelling of 25491066 in words is "twenty-five million, four hundred ninety-one thousand, sixty-six".