66533880125 has 12 divisors (see below), whose sum is σ = 83037881628. Its totient is φ = 53224797000.

The previous prime is 66533880073. The next prime is 66533880139. The reversal of 66533880125 is 52108833566.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 2129084164 + 64404795961 = 46142^2 + 253781^2 .

It is not a de Polignac number, because 66533880125 - 2¹⁴ = 66533863741 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66533880125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2872340 + ... + 2895410.

It is an arithmetic number, because the mean of its divisors is an integer number (6919823469).

Almost surely, 2^66533880125 is an apocalyptic number.

It is an amenable number.

66533880125 is a deficient number, since it is larger than the sum of its proper divisors (16504001503).

66533880125 is an frugal number, since it uses more digits than its factorization.

66533880125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46157 (or 23076 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 66533880125 in words is "sixty-six billion, five hundred thirty-three million, eight hundred eighty thousand, one hundred twenty-five".