66960579 has 32 divisors (see below), whose sum is σ = 107988480. Its totient is φ = 36052992.

The previous prime is 66960533. The next prime is 66960581. The reversal of 66960579 is 97506966.

It is not a de Polignac number, because 66960579 - 2⁹ = 66960067 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (66960529) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102217 + ... + 102869.

It is an arithmetic number, because the mean of its divisors is an integer number (3374640).

Almost surely, 2^66960579 is an apocalyptic number.

66960579 is a deficient number, since it is larger than the sum of its proper divisors (41027901).

66960579 is a wasteful number, since it uses less digits than its factorization.

66960579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939.

The product of its (nonzero) digits is 612360, while the sum is 48.

The square root of 66960579 is about 8182.9443967315. The cubic root of 66960579 is about 406.0751375573.

The spelling of 66960579 in words is "sixty-six million, nine hundred sixty thousand, five hundred seventy-nine".