25664146 has 8 divisors (see below), whose sum is σ = 38568240. Its totient is φ = 12808068.

The previous prime is 25664143. The next prime is 25664173. The reversal of 25664146 is 64146652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (25664143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10636 + ... + 12823.

It is an arithmetic number, because the mean of its divisors is an integer number (4821030).

Almost surely, 2^25664146 is an apocalyptic number.

25664146 is a deficient number, since it is larger than the sum of its proper divisors (12904094).

25664146 is a wasteful number, since it uses less digits than its factorization.

25664146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24008.

The product of its digits is 34560, while the sum is 34.

The square root of 25664146 is about 5065.9792735462. The cubic root of 25664146 is about 294.9684769534.

The spelling of 25664146 in words is "twenty-five million, six hundred sixty-four thousand, one hundred forty-six".