66530374203530 has 8 divisors (see below), whose sum is σ = 119754673566372. Its totient is φ = 26612149681408.

The previous prime is 66530374203521. The next prime is 66530374203539. The reversal of 66530374203530 is 3530247303566.

It is an interprime number because it is at equal distance from previous prime (66530374203521) and next prime (66530374203539).

It can be written as a sum of positive squares in 2 ways, for example, as 66295762812841 + 234611390689 = 8142221^2 + 484367^2 .

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

It is not an unprimeable number, because it can be changed into a prime (66530374203539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3326518710167 + ... + 3326518710186.

Almost surely, 2^{66530374203530} is an apocalyptic number.

66530374203530 is a deficient number, since it is larger than the sum of its proper divisors (53224299362842).

66530374203530 is a wasteful number, since it uses less digits than its factorization.

66530374203530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6653037420360.

The product of its (nonzero) digits is 4082400, while the sum is 47.

The spelling of 66530374203530 in words is "sixty-six trillion, five hundred thirty billion, three hundred seventy-four million, two hundred three thousand, five hundred thirty".