69664768 has 34 divisors (see below), whose sum is σ = 139459544. Its totient is φ = 34799616.

The previous prime is 69664753. The next prime is 69664787. The reversal of 69664768 is 86746696.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65005 + ... + 66067.

Almost surely, 2^69664768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69664768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69729772).

69664768 is an abundant number, since it is smaller than the sum of its proper divisors (69794776).

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

69664768 is an frugal number, since it uses more digits than its factorization.

69664768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095 (or 1065 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 52.

The square root of 69664768 is about 8346.5422780934. The cubic root of 69664768 is about 411.4695785112.

The spelling of 69664768 in words is "sixty-nine million, six hundred sixty-four thousand, seven hundred sixty-eight".