66870259 has 16 divisors (see below), whose sum is σ = 71215200. Its totient is φ = 62689536.

The previous prime is 66870247. The next prime is 66870277. The reversal of 66870259 is 95207866.

It is a cyclic number.

It is not a de Polignac number, because 66870259 - 2¹³ = 66862067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66870229) 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 15 ways as a sum of consecutive naturals, for example, 213487 + ... + 213799.

It is an arithmetic number, because the mean of its divisors is an integer number (4450950).

Almost surely, 2^66870259 is an apocalyptic number.

66870259 is a deficient number, since it is larger than the sum of its proper divisors (4344941).

66870259 is a wasteful number, since it uses less digits than its factorization.

66870259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 66870259 is about 8177.4237385622. The cubic root of 66870259 is about 405.8924768045.

The spelling of 66870259 in words is "sixty-six million, eight hundred seventy thousand, two hundred fifty-nine".