66240023925 has 24 divisors (see below), whose sum is σ = 109524597120. Its totient is φ = 35325510400.

The previous prime is 66240023879. The next prime is 66240023933. The reversal of 66240023925 is 52932004266.

It is not a de Polignac number, because 66240023925 - 2⁸ = 66240023669 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1593556 + ... + 1634594.

It is an arithmetic number, because the mean of its divisors is an integer number (4563524880).

Almost surely, 2^66240023925 is an apocalyptic number.

It is an amenable number.

66240023925 is a deficient number, since it is larger than the sum of its proper divisors (43284573195).

66240023925 is a wasteful number, since it uses less digits than its factorization.

66240023925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62573 (or 62568 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 66240023925 in words is "sixty-six billion, two hundred forty million, twenty-three thousand, nine hundred twenty-five".