66731196 has 96 divisors (see below), whose sum is σ = 184246272. Its totient is φ = 18406080.

The previous prime is 66731177. The next prime is 66731207. The reversal of 66731196 is 69113766.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 399505 + ... + 399671.

It is an arithmetic number, because the mean of its divisors is an integer number (1919232).

Almost surely, 2^66731196 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66731196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92123136).

66731196 is an abundant number, since it is smaller than the sum of its proper divisors (117515076).

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

66731196 is a wasteful number, since it uses less digits than its factorization.

66731196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319 (or 317 counting only the distinct ones).

The product of its digits is 40824, while the sum is 39.

The square root of 66731196 is about 8168.9164520149. The cubic root of 66731196 is about 405.6109176634.

The spelling of 66731196 in words is "sixty-six million, seven hundred thirty-one thousand, one hundred ninety-six".