25667961 has 8 divisors (see below), whose sum is σ = 37335264. Its totient is φ = 15556320.

The previous prime is 25667933. The next prime is 25667989. The reversal of 25667961 is 16976652.

It is an interprime number because it is at equal distance from previous prime (25667933) and next prime (25667989).

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

It is not a de Polignac number, because 25667961 - 2⁶ = 25667897 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (25667921) 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, 388876 + ... + 388941.

It is an arithmetic number, because the mean of its divisors is an integer number (4666908).

Almost surely, 2^25667961 is an apocalyptic number.

It is an amenable number.

25667961 is a deficient number, since it is larger than the sum of its proper divisors (11667303).

25667961 is a wasteful number, since it uses less digits than its factorization.

25667961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777831.

The product of its digits is 136080, while the sum is 42.

The square root of 25667961 is about 5066.3557909014. The cubic root of 25667961 is about 294.9830920119.

The spelling of 25667961 in words is "twenty-five million, six hundred sixty-seven thousand, nine hundred sixty-one".