66389359 has 8 divisors (see below), whose sum is σ = 68709168. Its totient is φ = 64097280.

The previous prime is 66389357. The next prime is 66389399. The reversal of 66389359 is 95398366.

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 66389359 - 2¹ = 66389357 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 (66389357) 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, 2002 + ... + 11695.

It is an arithmetic number, because the mean of its divisors is an integer number (8588646).

Almost surely, 2^66389359 is an apocalyptic number.

66389359 is a deficient number, since it is larger than the sum of its proper divisors (2319809).

66389359 is a wasteful number, since it uses less digits than its factorization.

66389359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13865.

The product of its digits is 1049760, while the sum is 49.

The square root of 66389359 is about 8147.9665561415. The cubic root of 66389359 is about 404.9171379530.

The spelling of 66389359 in words is "sixty-six million, three hundred eighty-nine thousand, three hundred fifty-nine".