66078617226 has 32 divisors (see below), whose sum is σ = 133675411968. Its totient is φ = 21773706240.

The previous prime is 66078617131. The next prime is 66078617233. The reversal of 66078617226 is 62271687066.

It is a Curzon 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, 436486 + ... + 568046.

It is an arithmetic number, because the mean of its divisors is an integer number (4177356624).

Almost surely, 2^66078617226 is an apocalyptic number.

66078617226 is an abundant number, since it is smaller than the sum of its proper divisors (67596794742).

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

66078617226 is a wasteful number, since it uses less digits than its factorization.

66078617226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132526.

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 66078617226 in words is "sixty-six billion, seventy-eight million, six hundred seventeen thousand, two hundred twenty-six".