66485679 has 16 divisors (see below), whose sum is σ = 95692800. Its totient is φ = 40817376.

The previous prime is 66485677. The next prime is 66485717. The reversal of 66485679 is 97658466.

It is not a de Polignac number, because 66485679 - 2¹ = 66485677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66485677) 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, 16902 + ... + 20460.

It is an arithmetic number, because the mean of its divisors is an integer number (5980800).

Almost surely, 2^66485679 is an apocalyptic number.

66485679 is a deficient number, since it is larger than the sum of its proper divisors (29207121).

66485679 is a wasteful number, since it uses less digits than its factorization.

66485679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4054.

The product of its digits is 2177280, while the sum is 51.

The square root of 66485679 is about 8153.8750910227. The cubic root of 66485679 is about 405.1128659676.

The spelling of 66485679 in words is "sixty-six million, four hundred eighty-five thousand, six hundred seventy-nine".