66166611666098 has 8 divisors (see below), whose sum is σ = 99258511344300. Its totient is φ = 33080441218000.

The previous prime is 66166611666073. The next prime is 66166611666107. The reversal of 66166611666098 is 89066611666166.

66166611666098 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 49319256336289 + 16847355329809 = 7022767^2 + 4104553^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1432278653 + ... + 1432324848.

Almost surely, 2^{66166611666098} is an apocalyptic number.

66166611666098 is a deficient number, since it is larger than the sum of its proper divisors (33091899678202).

66166611666098 is a wasteful number, since it uses less digits than its factorization.

66166611666098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2864615052.

The product of its (nonzero) digits is 120932352, while the sum is 68.

Adding to 66166611666098 its sum of digits (68), we get a palindrome (66166611666166).

The spelling of 66166611666098 in words is "sixty-six trillion, one hundred sixty-six billion, six hundred eleven million, six hundred sixty-six thousand, ninety-eight".