66215513334 has 16 divisors (see below), whose sum is σ = 133274538288. Its totient is φ = 21931252512.

The previous prime is 66215513297. The next prime is 66215513347. The reversal of 66215513334 is 43331551266.

It is a junction number, because it is equal to n+sod(n) for n = 66215513292 and 66215513301.

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 in 7 ways as a sum of consecutive naturals, for example, 35145297 + ... + 35147180.

It is an arithmetic number, because the mean of its divisors is an integer number (8329658643).

Almost surely, 2^66215513334 is an apocalyptic number.

66215513334 is an abundant number, since it is smaller than the sum of its proper divisors (67059024954).

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

66215513334 is a wasteful number, since it uses less digits than its factorization.

66215513334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70292639.

The product of its digits is 194400, while the sum is 39.

The spelling of 66215513334 in words is "sixty-six billion, two hundred fifteen million, five hundred thirteen thousand, three hundred thirty-four".