66560379 has 16 divisors (see below), whose sum is σ = 91828224. Its totient is φ = 42840000.

The previous prime is 66560369. The next prime is 66560407. The reversal of 66560379 is 97306566.

It is not a de Polignac number, because 66560379 - 2¹² = 66556283 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66560379.

It is not an unprimeable number, because it can be changed into a prime (66560309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69367 + ... + 70319.

It is an arithmetic number, because the mean of its divisors is an integer number (5739264).

Almost surely, 2^66560379 is an apocalyptic number.

66560379 is a deficient number, since it is larger than the sum of its proper divisors (25267845).

66560379 is a wasteful number, since it uses less digits than its factorization.

66560379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738.

The product of its (nonzero) digits is 204120, while the sum is 42.

The square root of 66560379 is about 8158.4544492201. The cubic root of 66560379 is about 405.2645307322.

The spelling of 66560379 in words is "sixty-six million, five hundred sixty thousand, three hundred seventy-nine".