69664416 has 24 divisors (see below), whose sum is σ = 182869344. Its totient is φ = 23221440.

The previous prime is 69664403. The next prime is 69664417. The reversal of 69664416 is 61446696.

It is a tau number, because it is divible by the number of its divisors (24).

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362740 + ... + 362931.

It is an arithmetic number, because the mean of its divisors is an integer number (7619556).

Almost surely, 2^69664416 is an apocalyptic number.

It is an amenable number.

69664416 is an abundant number, since it is smaller than the sum of its proper divisors (113204928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

69664416 is a wasteful number, since it uses less digits than its factorization.

69664416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725684 (or 725676 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 69664416 is about 8346.5211914905. The cubic root of 69664416 is about 411.4688854897.

The spelling of 69664416 in words is "sixty-nine million, six hundred sixty-four thousand, four hundred sixteen".