66263117 has 4 divisors (see below), whose sum is σ = 66599676. Its totient is φ = 65926560.

The previous prime is 66263111. The next prime is 66263123. The reversal of 66263117 is 71136266.

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 (66263111) and next prime (66263123).

It can be written as a sum of positive squares in 2 ways, for example, as 58049161 + 8213956 = 7619^2 + 2866^2 .

It is a cyclic number.

It is not a de Polignac number, because 66263117 - 2⁶ = 66263053 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 (66263111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167984 + ... + 168377.

It is an arithmetic number, because the mean of its divisors is an integer number (16649919).

Almost surely, 2^66263117 is an apocalyptic number.

It is an amenable number.

66263117 is a deficient number, since it is larger than the sum of its proper divisors (336559).

66263117 is a wasteful number, since it uses less digits than its factorization.

66263117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336558.

The product of its digits is 9072, while the sum is 32.

The square root of 66263117 is about 8140.2160290744. The cubic root of 66263117 is about 404.6603197668.

The spelling of 66263117 in words is "sixty-six million, two hundred sixty-three thousand, one hundred seventeen".