66813480134 has 4 divisors (see below), whose sum is σ = 100220220204. Its totient is φ = 33406740066.

The previous prime is 66813480127. The next prime is 66813480193. The reversal of 66813480134 is 43108431866.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×66813480134² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16703370032 + ... + 16703370035.

It is an arithmetic number, because the mean of its divisors is an integer number (25055055051).

Almost surely, 2^66813480134 is an apocalyptic number.

66813480134 is a deficient number, since it is larger than the sum of its proper divisors (33406740070).

66813480134 is a wasteful number, since it uses less digits than its factorization.

66813480134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33406740069.

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 66813480134 in words is "sixty-six billion, eight hundred thirteen million, four hundred eighty thousand, one hundred thirty-four".