69664415 has 4 divisors (see below), whose sum is σ = 83597304. Its totient is φ = 55731528.

The previous prime is 69664403. The next prime is 69664417. The reversal of 69664415 is 51446696.

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

It is a cyclic number.

It is not a de Polignac number, because 69664415 - 2²⁶ = 2555551 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 (69664417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6966437 + ... + 6966446.

It is an arithmetic number, because the mean of its divisors is an integer number (20899326).

Almost surely, 2^69664415 is an apocalyptic number.

69664415 is a deficient number, since it is larger than the sum of its proper divisors (13932889).

69664415 is a wasteful number, since it uses less digits than its factorization.

69664415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13932888.

The product of its digits is 155520, while the sum is 41.

The square root of 69664415 is about 8346.5211315853. The cubic root of 69664415 is about 411.4688835209.

The spelling of 69664415 in words is "sixty-nine million, six hundred sixty-four thousand, four hundred fifteen".