69664320 has 224 divisors, whose sum is σ = 268467840. Its totient is φ = 16865280.

The previous prime is 69664291. The next prime is 69664321. The reversal of 69664320 is 2346696.

69664320 is a `hidden beast` number, since 6 + 9 + 6 + 643 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (69664321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94674 + ... + 95406.

Almost surely, 2^69664320 is an apocalyptic number.

69664320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69664320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134233920).

69664320 is an abundant number, since it is smaller than the sum of its proper divisors (198803520).

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

69664320 is a wasteful number, since it uses less digits than its factorization.

69664320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770 (or 754 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 69664320 is about 8346.5154405896. The cubic root of 69664320 is about 411.4686964835.

The spelling of 69664320 in words is "sixty-nine million, six hundred sixty-four thousand, three hundred twenty".