66698192 has 20 divisors (see below), whose sum is σ = 140976096. Its totient is φ = 30317280.

The previous prime is 66698167. The next prime is 66698197. The reversal of 66698192 is 29189666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66698197) 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 3 ways as a sum of consecutive naturals, for example, 189308 + ... + 189659.

Almost surely, 2^66698192 is an apocalyptic number.

It is an amenable number.

66698192 is an abundant number, since it is smaller than the sum of its proper divisors (74277904).

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

66698192 is a wasteful number, since it uses less digits than its factorization.

66698192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378986 (or 378980 counting only the distinct ones).

The product of its digits is 279936, while the sum is 47.

The square root of 66698192 is about 8166.8961056205. The cubic root of 66698192 is about 405.5440374480.

The spelling of 66698192 in words is "sixty-six million, six hundred ninety-eight thousand, one hundred ninety-two".