25340432666 has 8 divisors (see below), whose sum is σ = 39663285984. Its totient is φ = 12119337340.

The previous prime is 25340432647. The next prime is 25340432687. The reversal of 25340432666 is 66623404352.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275439440 + ... + 275439531.

It is an arithmetic number, because the mean of its divisors is an integer number (4957910748).

Almost surely, 2^25340432666 is an apocalyptic number.

25340432666 is a deficient number, since it is larger than the sum of its proper divisors (14322853318).

25340432666 is a wasteful number, since it uses less digits than its factorization.

25340432666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550878996.

The product of its (nonzero) digits is 622080, while the sum is 41.

The spelling of 25340432666 in words is "twenty-five billion, three hundred forty million, four hundred thirty-two thousand, six hundred sixty-six".