65570820624 has 105 divisors (see below), whose sum is σ = 190558432479. Its totient is φ = 21847721760.

The previous prime is 65570820611. The next prime is 65570820629. The reversal of 65570820624 is 42602807556.

The square root of 65570820624 is 256068.

It is a perfect power (a square), and thus also a powerful number.

It is a self number, because there is not a number n which added to its sum of digits gives 65570820624.

It is not an unprimeable number, because it can be changed into a prime (65570820629) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 27654159 + ... + 27656529.

Almost surely, 2^65570820624 is an apocalyptic number.

65570820624 is the 256068-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65570820624

65570820624 is an abundant number, since it is smaller than the sum of its proper divisors (124987611855).

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

65570820624 is an frugal number, since it uses more digits than its factorization.

65570820624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4768 (or 2376 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 65570820624 in words is "sixty-five billion, five hundred seventy million, eight hundred twenty thousand, six hundred twenty-four".