66674066734 has 16 divisors (see below), whose sum is σ = 109115346816. Its totient is φ = 30302969400.

The previous prime is 66674066731. The next prime is 66674066743. The reversal of 66674066734 is 43766047666.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66674066731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33319 + ... + 366685.

It is an arithmetic number, because the mean of its divisors is an integer number (6819709176).

Almost surely, 2^66674066734 is an apocalyptic number.

66674066734 is a deficient number, since it is larger than the sum of its proper divisors (42441280082).

66674066734 is a wasteful number, since it uses less digits than its factorization.

66674066734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342471.

The product of its (nonzero) digits is 18289152, while the sum is 55.

The spelling of 66674066734 in words is "sixty-six billion, six hundred seventy-four million, sixty-six thousand, seven hundred thirty-four".