69668717 has 4 divisors (see below), whose sum is σ = 71367996. Its totient is φ = 67969440.

The previous prime is 69668707. The next prime is 69668719. The reversal of 69668717 is 71786696.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6482116 + 63186601 = 2546^2 + 7949^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69668717 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 (69668719) 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, 849578 + ... + 849659.

It is an arithmetic number, because the mean of its divisors is an integer number (17841999).

Almost surely, 2^69668717 is an apocalyptic number.

It is an amenable number.

69668717 is a deficient number, since it is larger than the sum of its proper divisors (1699279).

69668717 is a wasteful number, since it uses less digits than its factorization.

69668717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699278.

The product of its digits is 762048, while the sum is 50.

The square root of 69668717 is about 8346.7788397681. The cubic root of 69668717 is about 411.4773531856.

The spelling of 69668717 in words is "sixty-nine million, six hundred sixty-eight thousand, seven hundred seventeen".