66135206166406 has 32 divisors (see below), whose sum is σ = 108697461542208. Its totient is φ = 29992499994240.

The previous prime is 66135206166401. The next prime is 66135206166433. The reversal of 66135206166406 is 60466160253166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66135206166401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20027545 + ... + 23094868.

It is an arithmetic number, because the mean of its divisors is an integer number (3396795673194).

Almost surely, 2^{66135206166406} is an apocalyptic number.

66135206166406 is a deficient number, since it is larger than the sum of its proper divisors (42562255375802).

66135206166406 is a wasteful number, since it uses less digits than its factorization.

66135206166406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43123456.

The product of its (nonzero) digits is 5598720, while the sum is 52.

The spelling of 66135206166406 in words is "sixty-six trillion, one hundred thirty-five billion, two hundred six million, one hundred sixty-six thousand, four hundred six".