66666666098 has 16 divisors (see below), whose sum is σ = 105904039680. Its totient is φ = 31366122816.

The previous prime is 66666666097. The next prime is 66666666109. The reversal of 66666666098 is 89066666666.

It is not an unprimeable number, because it can be changed into a prime (66666666097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30278 + ... + 366401.

It is an arithmetic number, because the mean of its divisors is an integer number (6619002480).

Almost surely, 2^66666666098 is an apocalyptic number.

66666666098 is a deficient number, since it is larger than the sum of its proper divisors (39237373582).

66666666098 is a wasteful number, since it uses less digits than its factorization.

66666666098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401641.

The product of its (nonzero) digits is 120932352, while the sum is 65.

The spelling of 66666666098 in words is "sixty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, ninety-eight".