66879259 has 8 divisors (see below), whose sum is σ = 70868480. Its totient is φ = 62937000.

The previous prime is 66879257. The next prime is 66879283. The reversal of 66879259 is 95297866.

It is a happy number.

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 66879259 - 2¹ = 66879257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66879251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8787 + ... + 14524.

It is an arithmetic number, because the mean of its divisors is an integer number (8858560).

Almost surely, 2^66879259 is an apocalyptic number.

66879259 is a deficient number, since it is larger than the sum of its proper divisors (3989221).

66879259 is a wasteful number, since it uses less digits than its factorization.

66879259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23481.

The product of its digits is 1632960, while the sum is 52.

The square root of 66879259 is about 8177.9740156105. The cubic root of 66879259 is about 405.9106855392.

The spelling of 66879259 in words is "sixty-six million, eight hundred seventy-nine thousand, two hundred fifty-nine".