69664765 has 4 divisors (see below), whose sum is σ = 83597724. Its totient is φ = 55731808.

The previous prime is 69664753. The next prime is 69664787. The reversal of 69664765 is 56746696.

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 52838361 + 16826404 = 7269^2 + 4102^2 .

It is a cyclic number.

It is not a de Polignac number, because 69664765 - 2¹¹ = 69662717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6966472 + ... + 6966481.

It is an arithmetic number, because the mean of its divisors is an integer number (20899431).

Almost surely, 2^69664765 is an apocalyptic number.

It is an amenable number.

69664765 is a deficient number, since it is larger than the sum of its proper divisors (13932959).

69664765 is a wasteful number, since it uses less digits than its factorization.

69664765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13932958.

The product of its digits is 1632960, while the sum is 49.

The square root of 69664765 is about 8346.5420983782. The cubic root of 69664765 is about 411.4695726047.

The spelling of 69664765 in words is "sixty-nine million, six hundred sixty-four thousand, seven hundred sixty-five".