66770438044115 has 16 divisors (see below), whose sum is σ = 86289632895648. Its totient is φ = 49306439149056.

The previous prime is 66770438044109. The next prime is 66770438044133. The reversal of 66770438044115 is 51144083407766.

It is a cyclic number.

It is not a de Polignac number, because 66770438044115 - 2¹⁰ = 66770438043091 is a prime.

It is a super-2 number, since 2×66770438044115² (a number of 28 digits) contains 22 as substring.

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, 6644582 + ... + 13330091.

It is an arithmetic number, because the mean of its divisors is an integer number (5393102055978).

Almost surely, 2^{66770438044115} is an apocalyptic number.

66770438044115 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66770438044115 is a deficient number, since it is larger than the sum of its proper divisors (19519194851533).

66770438044115 is a wasteful number, since it uses less digits than its factorization.

66770438044115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20026118.

The product of its (nonzero) digits is 13547520, while the sum is 56.

The spelling of 66770438044115 in words is "sixty-six trillion, seven hundred seventy billion, four hundred thirty-eight million, forty-four thousand, one hundred fifteen".