66820874134 has 8 divisors (see below), whose sum is σ = 114550069968. Its totient is φ = 28637517480.

The previous prime is 66820874123. The next prime is 66820874143. The reversal of 66820874134 is 43147802866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2386459777 + ... + 2386459804.

It is an arithmetic number, because the mean of its divisors is an integer number (14318758746).

Almost surely, 2^66820874134 is an apocalyptic number.

66820874134 is a deficient number, since it is larger than the sum of its proper divisors (47729195834).

66820874134 is a wasteful number, since it uses less digits than its factorization.

66820874134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4772919590.

The product of its (nonzero) digits is 1548288, while the sum is 49.

The spelling of 66820874134 in words is "sixty-six billion, eight hundred twenty million, eight hundred seventy-four thousand, one hundred thirty-four".