66698106 has 16 divisors (see below), whose sum is σ = 141243264. Its totient is φ = 20924864.

The previous prime is 66698083. The next prime is 66698119. The reversal of 66698106 is 60189666.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326850 + ... + 327053.

It is an arithmetic number, because the mean of its divisors is an integer number (8827704).

Almost surely, 2^66698106 is an apocalyptic number.

66698106 is an abundant number, since it is smaller than the sum of its proper divisors (74545158).

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

66698106 is a wasteful number, since it uses less digits than its factorization.

66698106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653925.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 66698106 is about 8166.8908404606. The cubic root of 66698106 is about 405.5438631464.

The spelling of 66698106 in words is "sixty-six million, six hundred ninety-eight thousand, one hundred six".