25557667 has 2 divisors, whose sum is σ = 25557668. Its totient is φ = 25557666.

The previous prime is 25557661. The next prime is 25557673. The reversal of 25557667 is 76675552.

It is a balanced prime because it is at equal distance from previous prime (25557661) and next prime (25557673).

It is a cyclic number.

It is not a de Polignac number, because 25557667 - 2³ = 25557659 is a prime.

It is not a weakly prime, because it can be changed into another prime (25557661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12778833 + 12778834.

It is an arithmetic number, because the mean of its divisors is an integer number (12778834).

Almost surely, 2^25557667 is an apocalyptic number.

25557667 is a deficient number, since it is larger than the sum of its proper divisors (1).

25557667 is an equidigital number, since it uses as much as digits as its factorization.

25557667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 441000, while the sum is 43.

The square root of 25557667 is about 5055.4591285065. The cubic root of 25557667 is about 294.5599759858.

The spelling of 25557667 in words is "twenty-five million, five hundred fifty-seven thousand, six hundred sixty-seven".