69666697 has 8 divisors (see below), whose sum is σ = 74975112. Its totient is φ = 64492800.

The previous prime is 69666679. The next prime is 69666713. The reversal of 69666697 is 79666696.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21724921 + 47941776 = 4661^2 + 6924^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69666697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69666607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32554 + ... + 34627.

It is an arithmetic number, because the mean of its divisors is an integer number (9371889).

Almost surely, 2^69666697 is an apocalyptic number.

It is an amenable number.

69666697 is a deficient number, since it is larger than the sum of its proper divisors (5308415).

69666697 is a wasteful number, since it uses less digits than its factorization.

69666697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67259.

The product of its digits is 4408992, while the sum is 55.

The square root of 69666697 is about 8346.6578341274. The cubic root of 69666697 is about 411.4733763060.

Subtracting 69666697 from its reverse (79666696), we obtain a palindrome (9999999).

The spelling of 69666697 in words is "sixty-nine million, six hundred sixty-six thousand, six hundred ninety-seven".