66560398 has 8 divisors (see below), whose sum is σ = 100453608. Its totient is φ = 33075864.

The previous prime is 66560369. The next prime is 66560407. The reversal of 66560398 is 89306566.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101761 + ... + 102412.

It is an arithmetic number, because the mean of its divisors is an integer number (12556701).

Almost surely, 2^66560398 is an apocalyptic number.

66560398 is a deficient number, since it is larger than the sum of its proper divisors (33893210).

66560398 is a wasteful number, since it uses less digits than its factorization.

66560398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204338.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 66560398 is about 8158.4556136563. The cubic root of 66560398 is about 405.2645692938.

The spelling of 66560398 in words is "sixty-six million, five hundred sixty thousand, three hundred ninety-eight".