25621966 has 16 divisors (see below), whose sum is σ = 39549888. Its totient is φ = 12441600.

The previous prime is 25621961. The next prime is 25621969. The reversal of 25621966 is 66912652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25621961) 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, 21646 + ... + 22798.

It is an arithmetic number, because the mean of its divisors is an integer number (2471868).

Almost surely, 2^25621966 is an apocalyptic number.

25621966 is a deficient number, since it is larger than the sum of its proper divisors (13927922).

25621966 is a wasteful number, since it uses less digits than its factorization.

25621966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467.

The product of its digits is 38880, while the sum is 37.

The square root of 25621966 is about 5061.8144967986. The cubic root of 25621966 is about 294.8067910387.

It can be divided in two parts, 256 and 21966, that added together give a palindrome (22222).

The spelling of 25621966 in words is "twenty-five million, six hundred twenty-one thousand, nine hundred sixty-six".