66506657065122 has 32 divisors (see below), whose sum is σ = 133303459680000. Its totient is φ = 22120543822608.

The previous prime is 66506657065103. The next prime is 66506657065157. The reversal of 66506657065122 is 22156075660566.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14980393 + ... + 18905699.

It is an arithmetic number, because the mean of its divisors is an integer number (4165733115000).

Almost surely, 2^{66506657065122} is an apocalyptic number.

66506657065122 is an abundant number, since it is smaller than the sum of its proper divisors (66796802614878).

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

66506657065122 is a wasteful number, since it uses less digits than its factorization.

66506657065122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3931470.

The product of its (nonzero) digits is 27216000, while the sum is 57.

The spelling of 66506657065122 in words is "sixty-six trillion, five hundred six billion, six hundred fifty-seven million, sixty-five thousand, one hundred twenty-two".