66170134084618 has 4 divisors (see below), whose sum is σ = 99255201126930. Its totient is φ = 33085067042308.

The previous prime is 66170134084567. The next prime is 66170134084643. The reversal of 66170134084618 is 81648043107166.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 39419650149049 + 26750483935569 = 6278507^2 + 5172087^2 .

It is a super-3 number, since 3×66170134084618³ (a number of 42 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16542533521153 + ... + 16542533521156.

Almost surely, 2^{66170134084618} is an apocalyptic number.

66170134084618 is a deficient number, since it is larger than the sum of its proper divisors (33085067042312).

66170134084618 is a wasteful number, since it uses less digits than its factorization.

66170134084618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33085067042311.

The product of its (nonzero) digits is 4644864, while the sum is 55.

The spelling of 66170134084618 in words is "sixty-six trillion, one hundred seventy billion, one hundred thirty-four million, eighty-four thousand, six hundred eighteen".