65520507 has 8 divisors (see below), whose sum is σ = 94080784. Its totient is φ = 40320288.

The previous prime is 65520473. The next prime is 65520509. The reversal of 65520507 is 70502556.

65520507 = 2239² + 2240² + ... + 2251².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65520507 - 2²² = 61326203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65520509) 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, 839968 + ... + 840045.

It is an arithmetic number, because the mean of its divisors is an integer number (11760098).

Almost surely, 2^65520507 is an apocalyptic number.

65520507 is a deficient number, since it is larger than the sum of its proper divisors (28560277).

65520507 is a wasteful number, since it uses less digits than its factorization.

65520507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680029.

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 65520507 is about 8094.4738556623. The cubic root of 65520507 is about 403.1429626994.

The spelling of 65520507 in words is "sixty-five million, five hundred twenty thousand, five hundred seven".