69664572 has 72 divisors (see below), whose sum is σ = 188697600. Its totient is φ = 21593088.

The previous prime is 69664571. The next prime is 69664579. The reversal of 69664572 is 27546696.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69664571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53829 + ... + 55107.

It is an arithmetic number, because the mean of its divisors is an integer number (2620800).

Almost surely, 2^69664572 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 69664572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94348800).

69664572 is an abundant number, since it is smaller than the sum of its proper divisors (119033028).

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

69664572 is a wasteful number, since it uses less digits than its factorization.

69664572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395 (or 1390 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 69664572 is about 8346.5305366961. The cubic root of 69664572 is about 411.4691926245.

The spelling of 69664572 in words is "sixty-nine million, six hundred sixty-four thousand, five hundred seventy-two".