66706740674 has 16 divisors (see below), whose sum is σ = 121081143168. Its totient is φ = 26906920512.

The previous prime is 66706740619. The next prime is 66706740721. The reversal of 66706740674 is 47604760766.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140139974 + ... + 140140449.

It is an arithmetic number, because the mean of its divisors is an integer number (7567571448).

Almost surely, 2^66706740674 is an apocalyptic number.

66706740674 is a deficient number, since it is larger than the sum of its proper divisors (54374402494).

66706740674 is a wasteful number, since it uses less digits than its factorization.

66706740674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280280449.

The product of its (nonzero) digits is 7112448, while the sum is 53.

The spelling of 66706740674 in words is "sixty-six billion, seven hundred six million, seven hundred forty thousand, six hundred seventy-four".