25662998 has 4 divisors (see below), whose sum is σ = 38494500. Its totient is φ = 12831498.

The previous prime is 25662997. The next prime is 25663003. The reversal of 25662998 is 89926652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25662997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6415748 + ... + 6415751.

It is an arithmetic number, because the mean of its divisors is an integer number (9623625).

Almost surely, 2^25662998 is an apocalyptic number.

25662998 is a deficient number, since it is larger than the sum of its proper divisors (12831502).

25662998 is a wasteful number, since it uses less digits than its factorization.

25662998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12831501.

The product of its digits is 466560, while the sum is 47.

The square root of 25662998 is about 5065.8659674334. The cubic root of 25662998 is about 294.9640787440.

The spelling of 25662998 in words is "twenty-five million, six hundred sixty-two thousand, nine hundred ninety-eight".