25740166 has 8 divisors (see below), whose sum is σ = 39264840. Its totient is φ = 12651888.

The previous prime is 25740163. The next prime is 25740167. The reversal of 25740166 is 66104752.

It is a happy number.

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

It is a super-2 number, since 2×25740166² = 1325112291415112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25740163) 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, 108951 + ... + 109186.

It is an arithmetic number, because the mean of its divisors is an integer number (4908105).

Almost surely, 2^25740166 is an apocalyptic number.

25740166 is a deficient number, since it is larger than the sum of its proper divisors (13524674).

25740166 is a wasteful number, since it uses less digits than its factorization.

25740166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218198.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 25740166 is about 5073.4767172029. The cubic root of 25740166 is about 295.2594327963.

The spelling of 25740166 in words is "twenty-five million, seven hundred forty thousand, one hundred sixty-six".