66087398 has 16 divisors (see below), whose sum is σ = 113037120. Its totient is φ = 28707456.

The previous prime is 66087397. The next prime is 66087403. The reversal of 66087398 is 89378066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66087391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74318 + ... + 75201.

It is an arithmetic number, because the mean of its divisors is an integer number (7064820).

Almost surely, 2^66087398 is an apocalyptic number.

66087398 is a deficient number, since it is larger than the sum of its proper divisors (46949722).

66087398 is a wasteful number, since it uses less digits than its factorization.

66087398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149551.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 66087398 is about 8129.4156001523. The cubic root of 66087398 is about 404.3023053489.

The spelling of 66087398 in words is "sixty-six million, eighty-seven thousand, three hundred ninety-eight".