25166772 has 18 divisors (see below), whose sum is σ = 63616098. Its totient is φ = 8388912.

The previous prime is 25166767. The next prime is 25166777. The reversal of 25166772 is 27766152.

It is an interprime number because it is at equal distance from previous prime (25166767) and next prime (25166777).

It can be written as a sum of positive squares in only one way, i.e., 23853456 + 1313316 = 4884^2 + 1146^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 699077 = 25166772 / (2 + 5 + 1 + 6 + 6 + 7 + 7 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25166777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 349503 + ... + 349574.

Almost surely, 2^25166772 is an apocalyptic number.

It is an amenable number.

25166772 is an abundant number, since it is smaller than the sum of its proper divisors (38449326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25166772 is a wasteful number, since it uses less digits than its factorization.

25166772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699087 (or 699082 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 25166772 is about 5016.6494794833. The cubic root of 25166772 is about 293.0505257522.

The spelling of 25166772 in words is "twenty-five million, one hundred sixty-six thousand, seven hundred seventy-two".