66368959 has 4 divisors (see below), whose sum is σ = 66431104. Its totient is φ = 66306816.

The previous prime is 66368947. The next prime is 66368971. The reversal of 66368959 is 95986366.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (66368947) and next prime (66368971).

It is a cyclic number.

It is not a de Polignac number, because 66368959 - 2⁷ = 66368831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66368989) 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 3 ways as a sum of consecutive naturals, for example, 29442 + ... + 31615.

It is an arithmetic number, because the mean of its divisors is an integer number (16607776).

Almost surely, 2^66368959 is an apocalyptic number.

66368959 is a deficient number, since it is larger than the sum of its proper divisors (62145).

66368959 is a wasteful number, since it uses less digits than its factorization.

66368959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62144.

The product of its digits is 2099520, while the sum is 52.

The square root of 66368959 is about 8146.7146138796. The cubic root of 66368959 is about 404.8756596401.

The spelling of 66368959 in words is "sixty-six million, three hundred sixty-eight thousand, nine hundred fifty-nine".