66838360 has 16 divisors (see below), whose sum is σ = 150386400. Its totient is φ = 26735328.

The previous prime is 66838319. The next prime is 66838361. The reversal of 66838360 is 6383866.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1670959 = 66838360 / (6 + 6 + 8 + 3 + 8 + 3 + 6 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66838361) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 835440 + ... + 835519.

It is an arithmetic number, because the mean of its divisors is an integer number (9399150).

Almost surely, 2^66838360 is an apocalyptic number.

It is an amenable number.

66838360 is an abundant number, since it is smaller than the sum of its proper divisors (83548040).

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

66838360 is a wasteful number, since it uses less digits than its factorization.

66838360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670970 (or 1670966 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 66838360 is about 8175.4730749969. The cubic root of 66838360 is about 405.8279258186.

The spelling of 66838360 in words is "sixty-six million, eight hundred thirty-eight thousand, three hundred sixty".