66704326206 has 32 divisors (see below), whose sum is σ = 152734103808. Its totient is φ = 19024994880.

The previous prime is 66704326177. The next prime is 66704326207. The reversal of 66704326206 is 60262340766.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66704326207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1366735 + ... + 1414698.

It is an arithmetic number, because the mean of its divisors is an integer number (4772940744).

Almost surely, 2^66704326206 is an apocalyptic number.

66704326206 is an abundant number, since it is smaller than the sum of its proper divisors (86029777602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66704326206 is a wasteful number, since it uses less digits than its factorization.

66704326206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782016.

The product of its (nonzero) digits is 435456, while the sum is 42.

The spelling of 66704326206 in words is "sixty-six billion, seven hundred four million, three hundred twenty-six thousand, two hundred six".