25321582066 has 16 divisors (see below), whose sum is σ = 41934539808. Its totient is φ = 11371136800.

The previous prime is 25321582057. The next prime is 25321582079. The reversal of 25321582066 is 66028512352.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6931795 + ... + 6935446.

It is an arithmetic number, because the mean of its divisors is an integer number (2620908738).

Almost surely, 2^25321582066 is an apocalyptic number.

25321582066 is a deficient number, since it is larger than the sum of its proper divisors (16612957742).

25321582066 is a wasteful number, since it uses less digits than its factorization.

25321582066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13867337.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 25321582066 in words is "twenty-five billion, three hundred twenty-one million, five hundred eighty-two thousand, sixty-six".