66006610535 has 4 divisors (see below), whose sum is σ = 79207932648. Its totient is φ = 52805288424.

The previous prime is 66006610529. The next prime is 66006610573. The reversal of 66006610535 is 53501660066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53501660066 = 2 ⋅26750830033.

It is a cyclic number.

It is not a de Polignac number, because 66006610535 - 2⁶ = 66006610471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6600661049 + ... + 6600661058.

It is an arithmetic number, because the mean of its divisors is an integer number (19801983162).

Almost surely, 2^66006610535 is an apocalyptic number.

66006610535 is a deficient number, since it is larger than the sum of its proper divisors (13201322113).

66006610535 is a wasteful number, since it uses less digits than its factorization.

66006610535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13201322112.

The product of its (nonzero) digits is 97200, while the sum is 38.

The spelling of 66006610535 in words is "sixty-six billion, six million, six hundred ten thousand, five hundred thirty-five".