66838357 has 8 divisors (see below), whose sum is σ = 67411872. Its totient is φ = 66267600.

The previous prime is 66838319. The next prime is 66838361. The reversal of 66838357 is 75383866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66838357 - 2¹⁹ = 66314069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66838367) 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, 96382 + ... + 97072.

It is an arithmetic number, because the mean of its divisors is an integer number (8426484).

Almost surely, 2^66838357 is an apocalyptic number.

It is an amenable number.

66838357 is a deficient number, since it is larger than the sum of its proper divisors (573515).

66838357 is a wasteful number, since it uses less digits than its factorization.

66838357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379.

The product of its digits is 725760, while the sum is 46.

The square root of 66838357 is about 8175.4728915213. The cubic root of 66838357 is about 405.8279197468.

The spelling of 66838357 in words is "sixty-six million, eight hundred thirty-eight thousand, three hundred fifty-seven".