65370816 has 168 divisors, whose sum is σ = 221471744. Its totient is φ = 18040320.

The previous prime is 65370803. The next prime is 65370821. The reversal of 65370816 is 61807356.

It is a tau number, because it is divible by the number of its divisors (168).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124731 + ... + 125253.

Almost surely, 2^65370816 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 65370816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110735872).

65370816 is an abundant number, since it is smaller than the sum of its proper divisors (156100928).

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

65370816 is a wasteful number, since it uses less digits than its factorization.

65370816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579 (or 566 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 65370816 is about 8085.2220748722. Note that the first 3 decimals coincide. The cubic root of 65370816 is about 402.8357159485.

It can be divided in two parts, 65 and 370816, that added together give a square (370881 = 609²).

The spelling of 65370816 in words is "sixty-five million, three hundred seventy thousand, eight hundred sixteen".