25664433 has 8 divisors (see below), whose sum is σ = 34392000. Its totient is φ = 17023248.

The previous prime is 25664423. The next prime is 25664437. The reversal of 25664433 is 33446652.

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

It is not a de Polignac number, because 25664433 - 2¹⁶ = 25598897 is a prime.

It is a super-2 number, since 2×25664433² = 1317326242422978, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25664394 and 25664403.

It is not an unprimeable number, because it can be changed into a prime (25664437) 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, 20898 + ... + 22091.

It is an arithmetic number, because the mean of its divisors is an integer number (4299000).

Almost surely, 2^25664433 is an apocalyptic number.

It is an amenable number.

25664433 is a deficient number, since it is larger than the sum of its proper divisors (8727567).

25664433 is a wasteful number, since it uses less digits than its factorization.

25664433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43191.

The product of its digits is 51840, while the sum is 33.

The square root of 25664433 is about 5066.0075996785. The cubic root of 25664433 is about 294.9695764852.

The spelling of 25664433 in words is "twenty-five million, six hundred sixty-four thousand, four hundred thirty-three".