65016520 has 32 divisors (see below), whose sum is σ = 146587320. Its totient is φ = 25953280.

The previous prime is 65016509. The next prime is 65016527. The reversal of 65016520 is 2561056.

It can be written as a sum of positive squares in 4 ways, for example, as 49477156 + 15539364 = 7034^2 + 3942^2 .

It is a super-3 number, since 3×65016520³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (65016527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22350 + ... + 25090.

Almost surely, 2^65016520 is an apocalyptic number.

It is an amenable number.

65016520 is an abundant number, since it is smaller than the sum of its proper divisors (81570800).

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

65016520 is a wasteful number, since it uses less digits than its factorization.

65016520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3345 (or 3341 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 65016520 is about 8063.2822101177. The cubic root of 65016520 is about 402.1066357374.

Adding to 65016520 its reverse (2561056), we get a palindrome (67577576).

It can be divided in two parts, 65016 and 520, that added together give a 16-th power (65536 = 2¹⁶).

The spelling of 65016520 in words is "sixty-five million, sixteen thousand, five hundred twenty".