66838365 has 56 divisors (see below), whose sum is σ = 131264928. Its totient is φ = 32387040.

The previous prime is 66838363. The next prime is 66838367. The reversal of 66838365 is 56383866.

It is an interprime number because it is at equal distance from previous prime (66838363) and next prime (66838367).

It is not a de Polignac number, because 66838365 - 2¹ = 66838363 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 66838365.

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 polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 39262 + ... + 40928.

Almost surely, 2^66838365 is an apocalyptic number.

It is an amenable number.

66838365 is a deficient number, since it is larger than the sum of its proper divisors (64426563).

66838365 is a wasteful number, since it uses less digits than its factorization.

66838365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701 (or 1686 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 66838365 is about 8175.4733807896. The cubic root of 66838365 is about 405.8279359382.

The spelling of 66838365 in words is "sixty-six million, eight hundred thirty-eight thousand, three hundred sixty-five".