65520063 has 16 divisors (see below), whose sum is σ = 110933760. Its totient is φ = 37439928.

The previous prime is 65520053. The next prime is 65520071. The reversal of 65520063 is 36002556.

65520063 is a `hidden beast` number, since 655 + 2 + 0 + 0 + 6 + 3 = 666.

It is not a de Polignac number, because 65520063 - 2⁴ = 65520047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65520053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173145 + ... + 173522.

It is an arithmetic number, because the mean of its divisors is an integer number (6933360).

Almost surely, 2^65520063 is an apocalyptic number.

65520063 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

65520063 is a deficient number, since it is larger than the sum of its proper divisors (45413697).

65520063 is a wasteful number, since it uses less digits than its factorization.

65520063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346683 (or 346677 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 65520063 is about 8094.4464294972. The cubic root of 65520063 is about 403.1420520640.

The spelling of 65520063 in words is "sixty-five million, five hundred twenty thousand, sixty-three".