66345556125 has 32 divisors (see below), whose sum is σ = 116209491840. Its totient is φ = 33521961600.

The previous prime is 66345556097. The next prime is 66345556153. The reversal of 66345556125 is 52165554366.

66345556125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66345556097) and next prime (66345556153).

It is not a de Polignac number, because 66345556125 - 2¹⁸ = 66345293981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4648704 + ... + 4662953.

It is an arithmetic number, because the mean of its divisors is an integer number (3631546620).

Almost surely, 2^66345556125 is an apocalyptic number.

It is an amenable number.

66345556125 is a deficient number, since it is larger than the sum of its proper divisors (49863935715).

66345556125 is a wasteful number, since it uses less digits than its factorization.

66345556125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9311694 (or 9311684 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 48.

The spelling of 66345556125 in words is "sixty-six billion, three hundred forty-five million, five hundred fifty-six thousand, one hundred twenty-five".